Finding the Fourth Proportional to 42,129.47, 58,139.07 and 23,979.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42,129.47 : 58,139.07 = 23,979.31 : x
2. Step 2: Convert to fraction form
   42,129.47/58,139.07 = 23,979.31/x
3. Step 3: Cross multiply
   42,129.47x = 58,139.07 × 23,979.31
4. Step 4: Simplify right side
   42,129.47x = 1,394,134,900.28
5. Step 5: Solve for x
   x = 1,394,134,900.28/42,129.47
6. Step 6: Final answer
   x = 33,091.68