Finding the Fourth Proportional to 12,535.89, 17,287.59 and 7,499.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,535.89 : 17,287.59 = 7,499.31 : x
2. Step 2: Convert to fraction form
   12,535.89/17,287.59 = 7,499.31/x
3. Step 3: Cross multiply
   12,535.89x = 17,287.59 × 7,499.31
4. Step 4: Simplify right side
   12,535.89x = 129,644,996.56
5. Step 5: Solve for x
   x = 129,644,996.56/12,535.89
6. Step 6: Final answer
   x = 10,341.91