Finding the Fourth Proportional to 9,159.83, 12,640.57 and 5,180.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,159.83 : 12,640.57 = 5,180.86 : x
2. Step 2: Convert to fraction form
   9,159.83/12,640.57 = 5,180.86/x
3. Step 3: Cross multiply
   9,159.83x = 12,640.57 × 5,180.86
4. Step 4: Simplify right side
   9,159.83x = 65,488,934.38
5. Step 5: Solve for x
   x = 65,488,934.38/9,159.83
6. Step 6: Final answer
   x = 7,149.58