Finding the Fourth Proportional to 42,557.38, 58,685.68 and 28,212.24

Step by Step Solution

1. Step 1: Write the proportion equation
   42,557.38 : 58,685.68 = 28,212.24 : x
2. Step 2: Convert to fraction form
   42,557.38/58,685.68 = 28,212.24/x
3. Step 3: Cross multiply
   42,557.38x = 58,685.68 × 28,212.24
4. Step 4: Simplify right side
   42,557.38x = 1,655,654,488.72
5. Step 5: Solve for x
   x = 1,655,654,488.72/42,557.38
6. Step 6: Final answer
   x = 38,904.05