Finding the Fourth Proportional to 11,142.72, 15,384.96 and 8,363.52

Step by Step Solution

1. Step 1: Write the proportion equation
   11,142.72 : 15,384.96 = 8,363.52 : x
2. Step 2: Convert to fraction form
   11,142.72/15,384.96 = 8,363.52/x
3. Step 3: Cross multiply
   11,142.72x = 15,384.96 × 8,363.52
4. Step 4: Simplify right side
   11,142.72x = 128,672,420.66
5. Step 5: Solve for x
   x = 128,672,420.66/11,142.72
6. Step 6: Final answer
   x = 11,547.67