Finding the Fourth Proportional to 8,340.57, 12,514.34 and 3,658.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,340.57 : 12,514.34 = 3,658.15 : x
2. Step 2: Convert to fraction form
   8,340.57/12,514.34 = 3,658.15/x
3. Step 3: Cross multiply
   8,340.57x = 12,514.34 × 3,658.15
4. Step 4: Simplify right side
   8,340.57x = 45,779,332.87
5. Step 5: Solve for x
   x = 45,779,332.87/8,340.57
6. Step 6: Final answer
   x = 5,488.75