Finding the Fourth Proportional to 83,693.28, 125,539.92 and 31,116

Step by Step Solution

1. Step 1: Write the proportion equation
   83,693.28 : 125,539.92 = 31,116 : x
2. Step 2: Convert to fraction form
   83,693.28/125,539.92 = 31,116/x
3. Step 3: Cross multiply
   83,693.28x = 125,539.92 × 31,116
4. Step 4: Simplify right side
   83,693.28x = 3,906,300,150.72
5. Step 5: Solve for x
   x = 3,906,300,150.72/83,693.28
6. Step 6: Final answer
   x = 46,674