Finding the Fourth Proportional to 42,182.98, 58,260.36 and 28,730.90

Step by Step Solution

1. Step 1: Write the proportion equation
   42,182.98 : 58,260.36 = 28,730.90 : x
2. Step 2: Convert to fraction form
   42,182.98/58,260.36 = 28,730.90/x
3. Step 3: Cross multiply
   42,182.98x = 58,260.36 × 28,730.90
4. Step 4: Simplify right side
   42,182.98x = 1,673,872,830.52
5. Step 5: Solve for x
   x = 1,673,872,830.52/42,182.98
6. Step 6: Final answer
   x = 39,681.24