Finding the Fourth Proportional to 42,118.98, 58,105.55 and 28,502.17

Step by Step Solution

1. Step 1: Write the proportion equation
   42,118.98 : 58,105.55 = 28,502.17 : x
2. Step 2: Convert to fraction form
   42,118.98/58,105.55 = 28,502.17/x
3. Step 3: Cross multiply
   42,118.98x = 58,105.55 × 28,502.17
4. Step 4: Simplify right side
   42,118.98x = 1,656,133,973.52
5. Step 5: Solve for x
   x = 1,656,133,973.52/42,118.98
6. Step 6: Final answer
   x = 39,320.38