Finding the Fourth Proportional to 11,385.96, 15,702.76 and 7,405.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,385.96 : 15,702.76 = 7,405.60 : x
2. Step 2: Convert to fraction form
   11,385.96/15,702.76 = 7,405.60/x
3. Step 3: Cross multiply
   11,385.96x = 15,702.76 × 7,405.60
4. Step 4: Simplify right side
   11,385.96x = 116,288,359.46
5. Step 5: Solve for x
   x = 116,288,359.46/11,385.96
6. Step 6: Final answer
   x = 10,213.31