Finding the Fourth Proportional to 11,608.50, 16,020.02 and 7,129.71

Step by Step Solution

1. Step 1: Write the proportion equation
   11,608.50 : 16,020.02 = 7,129.71 : x
2. Step 2: Convert to fraction form
   11,608.50/16,020.02 = 7,129.71/x
3. Step 3: Cross multiply
   11,608.50x = 16,020.02 × 7,129.71
4. Step 4: Simplify right side
   11,608.50x = 114,218,061.15
5. Step 5: Solve for x
   x = 114,218,061.15/11,608.50
6. Step 6: Final answer
   x = 9,839.17