Finding the Fourth Proportional to 57,079.50, 78,769.80 and 31,929

Step by Step Solution

1. Step 1: Write the proportion equation
   57,079.50 : 78,769.80 = 31,929 : x
2. Step 2: Convert to fraction form
   57,079.50/78,769.80 = 31,929/x
3. Step 3: Cross multiply
   57,079.50x = 78,769.80 × 31,929
4. Step 4: Simplify right side
   57,079.50x = 2,515,040,944.20
5. Step 5: Solve for x
   x = 2,515,040,944.20/57,079.50
6. Step 6: Final answer
   x = 44,062.07