Finding the Fourth Proportional to 78,857.58, 108,761.76 and 50,565.90

Step by Step Solution

1. Step 1: Write the proportion equation
   78,857.58 : 108,761.76 = 50,565.90 : x
2. Step 2: Convert to fraction form
   78,857.58/108,761.76 = 50,565.90/x
3. Step 3: Cross multiply
   78,857.58x = 108,761.76 × 50,565.90
4. Step 4: Simplify right side
   78,857.58x = 5,499,636,279.98
5. Step 5: Solve for x
   x = 5,499,636,279.98/78,857.58
6. Step 6: Final answer
   x = 69,741.38