Finding the Fourth Proportional to 57,121.24, 78,830.94 and 31,978.84

Step by Step Solution

1. Step 1: Write the proportion equation
   57,121.24 : 78,830.94 = 31,978.84 : x
2. Step 2: Convert to fraction form
   57,121.24/78,830.94 = 31,978.84/x
3. Step 3: Cross multiply
   57,121.24x = 78,830.94 × 31,978.84
4. Step 4: Simplify right side
   57,121.24x = 2,520,922,017.31
5. Step 5: Solve for x
   x = 2,520,922,017.31/57,121.24
6. Step 6: Final answer
   x = 44,132.83