Finding the Fourth Proportional to 42,039.72, 62,731.62 and 38,313.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,039.72 : 62,731.62 = 38,313.72 : x
2. Step 2: Convert to fraction form
   42,039.72/62,731.62 = 38,313.72/x
3. Step 3: Cross multiply
   42,039.72x = 62,731.62 × 38,313.72
4. Step 4: Simplify right side
   42,039.72x = 2,403,481,723.83
5. Step 5: Solve for x
   x = 2,403,481,723.83/42,039.72
6. Step 6: Final answer
   x = 57,171.69