Finding the Fourth Proportional to 57,121.32, 78,826.82 and 31,971

Step by Step Solution

1. Step 1: Write the proportion equation
   57,121.32 : 78,826.82 = 31,971 : x
2. Step 2: Convert to fraction form
   57,121.32/78,826.82 = 31,971/x
3. Step 3: Cross multiply
   57,121.32x = 78,826.82 × 31,971
4. Step 4: Simplify right side
   57,121.32x = 2,520,172,262.22
5. Step 5: Solve for x
   x = 2,520,172,262.22/57,121.32
6. Step 6: Final answer
   x = 44,119.64