Finding the Fourth Proportional to 42,118.74, 58,105.20 and 28,501.92

Step by Step Solution

1. Step 1: Write the proportion equation
   42,118.74 : 58,105.20 = 28,501.92 : x
2. Step 2: Convert to fraction form
   42,118.74/58,105.20 = 28,501.92/x
3. Step 3: Cross multiply
   42,118.74x = 58,105.20 × 28,501.92
4. Step 4: Simplify right side
   42,118.74x = 1,656,109,761.98
5. Step 5: Solve for x
   x = 1,656,109,761.98/42,118.74
6. Step 6: Final answer
   x = 39,320.02