Finding the Fourth Proportional to 11,132.85, 15,355.94 and 7,158.99

Step by Step Solution

1. Step 1: Write the proportion equation
   11,132.85 : 15,355.94 = 7,158.99 : x
2. Step 2: Convert to fraction form
   11,132.85/15,355.94 = 7,158.99/x
3. Step 3: Cross multiply
   11,132.85x = 15,355.94 × 7,158.99
4. Step 4: Simplify right side
   11,132.85x = 109,932,954.37
5. Step 5: Solve for x
   x = 109,932,954.37/11,132.85
6. Step 6: Final answer
   x = 9,874.65