Finding the Fourth Proportional to 57,126.72, 78,834.88 and 31,976

Step by Step Solution

1. Step 1: Write the proportion equation
   57,126.72 : 78,834.88 = 31,976 : x
2. Step 2: Convert to fraction form
   57,126.72/78,834.88 = 31,976/x
3. Step 3: Cross multiply
   57,126.72x = 78,834.88 × 31,976
4. Step 4: Simplify right side
   57,126.72x = 2,520,824,122.88
5. Step 5: Solve for x
   x = 2,520,824,122.88/57,126.72
6. Step 6: Final answer
   x = 44,126.88