Finding the Fourth Proportional to 83,915.40, 125,874.78 and 31,314.40

Step by Step Solution

1. Step 1: Write the proportion equation
   83,915.40 : 125,874.78 = 31,314.40 : x
2. Step 2: Convert to fraction form
   83,915.40/125,874.78 = 31,314.40/x
3. Step 3: Cross multiply
   83,915.40x = 125,874.78 × 31,314.40
4. Step 4: Simplify right side
   83,915.40x = 3,941,693,210.83
5. Step 5: Solve for x
   x = 3,941,693,210.83/83,915.40
6. Step 6: Final answer
   x = 46,972.23