Finding the Fourth Proportional to 57,178.18, 78,898.42 and 31,683.31

Step by Step Solution

1. Step 1: Write the proportion equation
   57,178.18 : 78,898.42 = 31,683.31 : x
2. Step 2: Convert to fraction form
   57,178.18/78,898.42 = 31,683.31/x
3. Step 3: Cross multiply
   57,178.18x = 78,898.42 × 31,683.31
4. Step 4: Simplify right side
   57,178.18x = 2,499,762,863.54
5. Step 5: Solve for x
   x = 2,499,762,863.54/57,178.18
6. Step 6: Final answer
   x = 43,718.83