Finding the Fourth Proportional to 11,131.26, 15,352.29 and 7,152.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,131.26 : 15,352.29 = 7,152.78 : x
2. Step 2: Convert to fraction form
   11,131.26/15,352.29 = 7,152.78/x
3. Step 3: Cross multiply
   11,131.26x = 15,352.29 × 7,152.78
4. Step 4: Simplify right side
   11,131.26x = 109,811,552.87
5. Step 5: Solve for x
   x = 109,811,552.87/11,131.26
6. Step 6: Final answer
   x = 9,865.15