Finding the Fourth Proportional to 57,081, 78,771.78 and 31,930.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,081 : 78,771.78 = 31,930.50 : x
2. Step 2: Convert to fraction form
   57,081/78,771.78 = 31,930.50/x
3. Step 3: Cross multiply
   57,081x = 78,771.78 × 31,930.50
4. Step 4: Simplify right side
   57,081x = 2,515,222,321.29
5. Step 5: Solve for x
   x = 2,515,222,321.29/57,081
6. Step 6: Final answer
   x = 44,064.09