Finding the Fourth Proportional to 78,139.62, 107,832.96 and 42,329.54

Step by Step Solution

1. Step 1: Write the proportion equation
   78,139.62 : 107,832.96 = 42,329.54 : x
2. Step 2: Convert to fraction form
   78,139.62/107,832.96 = 42,329.54/x
3. Step 3: Cross multiply
   78,139.62x = 107,832.96 × 42,329.54
4. Step 4: Simplify right side
   78,139.62x = 4,564,519,593.64
5. Step 5: Solve for x
   x = 4,564,519,593.64/78,139.62
6. Step 6: Final answer
   x = 58,414.92