Finding the Fourth Proportional to 42,129.94, 58,139.72 and 23,979.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,129.94 : 58,139.72 = 23,979.78 : x
2. Step 2: Convert to fraction form
   42,129.94/58,139.72 = 23,979.78/x
3. Step 3: Cross multiply
   42,129.94x = 58,139.72 × 23,979.78
4. Step 4: Simplify right side
   42,129.94x = 1,394,177,694.86
5. Step 5: Solve for x
   x = 1,394,177,694.86/42,129.94
6. Step 6: Final answer
   x = 33,092.33