Finding the Fourth Proportional to 137,859.83, 206,642.72 and 78,567.83

Step by Step Solution

1. Step 1: Write the proportion equation
   137,859.83 : 206,642.72 = 78,567.83 : x
2. Step 2: Convert to fraction form
   137,859.83/206,642.72 = 78,567.83/x
3. Step 3: Cross multiply
   137,859.83x = 206,642.72 × 78,567.83
4. Step 4: Simplify right side
   137,859.83x = 16,235,468,669.64
5. Step 5: Solve for x
   x = 16,235,468,669.64/137,859.83
6. Step 6: Final answer
   x = 117,767.95