Finding the Fourth Proportional to 8,639,698.50, 12,961,647.27 and 2,656,066.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,639,698.50 : 12,961,647.27 = 2,656,066.50 : x
2. Step 2: Convert to fraction form
   8,639,698.50/12,961,647.27 = 2,656,066.50/x
3. Step 3: Cross multiply
   8,639,698.50x = 12,961,647.27 × 2,656,066.50
4. Step 4: Simplify right side
   8,639,698.50x = 34,426,997,098,663.45
5. Step 5: Solve for x
   x = 34,426,997,098,663.45/8,639,698.50
6. Step 6: Final answer
   x = 3,984,745.20