Finding the Fourth Proportional to 11,377.52, 15,691.69 and 9,553.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,377.52 : 15,691.69 = 9,553.50 : x
2. Step 2: Convert to fraction form
   11,377.52/15,691.69 = 9,553.50/x
3. Step 3: Cross multiply
   11,377.52x = 15,691.69 × 9,553.50
4. Step 4: Simplify right side
   11,377.52x = 149,910,560.42
5. Step 5: Solve for x
   x = 149,910,560.42/11,377.52
6. Step 6: Final answer
   x = 13,176.03