Finding the Fourth Proportional to 10,688.61, 14,740.70 and 8,902.02

Step by Step Solution

1. Step 1: Write the proportion equation
   10,688.61 : 14,740.70 = 8,902.02 : x
2. Step 2: Convert to fraction form
   10,688.61/14,740.70 = 8,902.02/x
3. Step 3: Cross multiply
   10,688.61x = 14,740.70 × 8,902.02
4. Step 4: Simplify right side
   10,688.61x = 131,222,006.21
5. Step 5: Solve for x
   x = 131,222,006.21/10,688.61
6. Step 6: Final answer
   x = 12,276.81