Answer
The answer is Megawati Sukarnoputri. She was the incumbent president of Indonesia when Susilo Bambang Yudhoyono won the presidential election in 2004. Megawati was elected president in 2001 following the resignation of Abdurrahman Wahid. Her presidency was marked by several challenges, including the 2002 Bali bombings and the separatist conflict in Aceh. Despite these challenges, she oversaw a period of economic growth and stability.