Finding the Fourth Proportional to 11,142.48, 15,381.72 and 9,624

Step by Step Solution

1. Step 1: Write the proportion equation
   11,142.48 : 15,381.72 = 9,624 : x
2. Step 2: Convert to fraction form
   11,142.48/15,381.72 = 9,624/x
3. Step 3: Cross multiply
   11,142.48x = 15,381.72 × 9,624
4. Step 4: Simplify right side
   11,142.48x = 148,033,673.28
5. Step 5: Solve for x
   x = 148,033,673.28/11,142.48
6. Step 6: Final answer
   x = 13,285.52