Finding the Fourth Proportional to 78,139.71, 107,832.47 and 42,329.79

Step by Step Solution

1. Step 1: Write the proportion equation
   78,139.71 : 107,832.47 = 42,329.79 : x
2. Step 2: Convert to fraction form
   78,139.71/107,832.47 = 42,329.79/x
3. Step 3: Cross multiply
   78,139.71x = 107,832.47 × 42,329.79
4. Step 4: Simplify right side
   78,139.71x = 4,564,525,598.63
5. Step 5: Solve for x
   x = 4,564,525,598.63/78,139.71
6. Step 6: Final answer
   x = 58,414.93