Finding the Fourth Proportional to 42,141.40, 58,178.46 and 28,732.36

Step by Step Solution

1. Step 1: Write the proportion equation
   42,141.40 : 58,178.46 = 28,732.36 : x
2. Step 2: Convert to fraction form
   42,141.40/58,178.46 = 28,732.36/x
3. Step 3: Cross multiply
   42,141.40x = 58,178.46 × 28,732.36
4. Step 4: Simplify right side
   42,141.40x = 1,671,604,456.97
5. Step 5: Solve for x
   x = 1,671,604,456.97/42,141.40
6. Step 6: Final answer
   x = 39,666.56