Finding the Fourth Proportional to 11,311.47, 15,610.32 and 7,528.59

Step by Step Solution

1. Step 1: Write the proportion equation
   11,311.47 : 15,610.32 = 7,528.59 : x
2. Step 2: Convert to fraction form
   11,311.47/15,610.32 = 7,528.59/x
3. Step 3: Cross multiply
   11,311.47x = 15,610.32 × 7,528.59
4. Step 4: Simplify right side
   11,311.47x = 117,523,699.05
5. Step 5: Solve for x
   x = 117,523,699.05/11,311.47
6. Step 6: Final answer
   x = 10,389.78