Finding the Fourth Proportional to 9,124.18, 12,598.50 and 7,140.39

Step by Step Solution

1. Step 1: Write the proportion equation
   9,124.18 : 12,598.50 = 7,140.39 : x
2. Step 2: Convert to fraction form
   9,124.18/12,598.50 = 7,140.39/x
3. Step 3: Cross multiply
   9,124.18x = 12,598.50 × 7,140.39
4. Step 4: Simplify right side
   9,124.18x = 89,958,167.71
5. Step 5: Solve for x
   x = 89,958,167.71/9,124.18
6. Step 6: Final answer
   x = 9,859.32