Finding the Fourth Proportional to 11,687.32, 16,139.28 and 7,502.86

Step by Step Solution

1. Step 1: Write the proportion equation
   11,687.32 : 16,139.28 = 7,502.86 : x
2. Step 2: Convert to fraction form
   11,687.32/16,139.28 = 7,502.86/x
3. Step 3: Cross multiply
   11,687.32x = 16,139.28 × 7,502.86
4. Step 4: Simplify right side
   11,687.32x = 121,090,758.34
5. Step 5: Solve for x
   x = 121,090,758.34/11,687.32
6. Step 6: Final answer
   x = 10,360.87