Finding the Fourth Proportional to 8,737.60, 12,061.40 and 5,200.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,737.60 : 12,061.40 = 5,200.12 : x
2. Step 2: Convert to fraction form
   8,737.60/12,061.40 = 5,200.12/x
3. Step 3: Cross multiply
   8,737.60x = 12,061.40 × 5,200.12
4. Step 4: Simplify right side
   8,737.60x = 62,720,727.37
5. Step 5: Solve for x
   x = 62,720,727.37/8,737.60
6. Step 6: Final answer
   x = 7,178.26