Finding the Fourth Proportional to 78,155.85, 107,854.23 and 42,343.74

Step by Step Solution

1. Step 1: Write the proportion equation
   78,155.85 : 107,854.23 = 42,343.74 : x
2. Step 2: Convert to fraction form
   78,155.85/107,854.23 = 42,343.74/x
3. Step 3: Cross multiply
   78,155.85x = 107,854.23 × 42,343.74
4. Step 4: Simplify right side
   78,155.85x = 4,566,951,473.02
5. Step 5: Solve for x
   x = 4,566,951,473.02/78,155.85
6. Step 6: Final answer
   x = 58,433.90