Finding the Fourth Proportional to 11,131.76, 15,352.98 and 7,153.28

Step by Step Solution

1. Step 1: Write the proportion equation
   11,131.76 : 15,352.98 = 7,153.28 : x
2. Step 2: Convert to fraction form
   11,131.76/15,352.98 = 7,153.28/x
3. Step 3: Cross multiply
   11,131.76x = 15,352.98 × 7,153.28
4. Step 4: Simplify right side
   11,131.76x = 109,824,164.77
5. Step 5: Solve for x
   x = 109,824,164.77/11,131.76
6. Step 6: Final answer
   x = 9,865.84