Finding the Fourth Proportional to 11,180.72, 15,410.76 and 8,381.36

Step by Step Solution

1. Step 1: Write the proportion equation
   11,180.72 : 15,410.76 = 8,381.36 : x
2. Step 2: Convert to fraction form
   11,180.72/15,410.76 = 8,381.36/x
3. Step 3: Cross multiply
   11,180.72x = 15,410.76 × 8,381.36
4. Step 4: Simplify right side
   11,180.72x = 129,163,127.43
5. Step 5: Solve for x
   x = 129,163,127.43/11,180.72
6. Step 6: Final answer
   x = 11,552.31