Finding the Fourth Proportional to 57,229.35, 78,976.50 and 31,739.61

Step by Step Solution

1. Step 1: Write the proportion equation
   57,229.35 : 78,976.50 = 31,739.61 : x
2. Step 2: Convert to fraction form
   57,229.35/78,976.50 = 31,739.61/x
3. Step 3: Cross multiply
   57,229.35x = 78,976.50 × 31,739.61
4. Step 4: Simplify right side
   57,229.35x = 2,506,683,014.82
5. Step 5: Solve for x
   x = 2,506,683,014.82/57,229.35
6. Step 6: Final answer
   x = 43,800.66