Finding the Fourth Proportional to 42,280.38, 58,333.77 and 28,135.62

Step by Step Solution

1. Step 1: Write the proportion equation
   42,280.38 : 58,333.77 = 28,135.62 : x
2. Step 2: Convert to fraction form
   42,280.38/58,333.77 = 28,135.62/x
3. Step 3: Cross multiply
   42,280.38x = 58,333.77 × 28,135.62
4. Step 4: Simplify right side
   42,280.38x = 1,641,256,785.89
5. Step 5: Solve for x
   x = 1,641,256,785.89/42,280.38
6. Step 6: Final answer
   x = 38,818.40