Finding the Fourth Proportional to 78,139.74, 107,833.35 and 42,329.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,139.74 : 107,833.35 = 42,329.72 : x
2. Step 2: Convert to fraction form
   78,139.74/107,833.35 = 42,329.72/x
3. Step 3: Cross multiply
   78,139.74x = 107,833.35 × 42,329.72
4. Step 4: Simplify right side
   78,139.74x = 4,564,555,512.16
5. Step 5: Solve for x
   x = 4,564,555,512.16/78,139.74
6. Step 6: Final answer
   x = 58,415.29