Finding the Fourth Proportional to 42,398.06, 58,517.46 and 28,058.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42,398.06 : 58,517.46 = 28,058.18 : x
2. Step 2: Convert to fraction form
   42,398.06/58,517.46 = 28,058.18/x
3. Step 3: Cross multiply
   42,398.06x = 58,517.46 × 28,058.18
4. Step 4: Simplify right side
   42,398.06x = 1,641,893,133.24
5. Step 5: Solve for x
   x = 1,641,893,133.24/42,398.06
6. Step 6: Final answer
   x = 38,725.67