Finding the Fourth Proportional to 140,879.52, 194,418.72 and 77,217.30

Step by Step Solution

1. Step 1: Write the proportion equation
   140,879.52 : 194,418.72 = 77,217.30 : x
2. Step 2: Convert to fraction form
   140,879.52/194,418.72 = 77,217.30/x
3. Step 3: Cross multiply
   140,879.52x = 194,418.72 × 77,217.30
4. Step 4: Simplify right side
   140,879.52x = 15,012,488,627.86
5. Step 5: Solve for x
   x = 15,012,488,627.86/140,879.52
6. Step 6: Final answer
   x = 106,562.60