Finding the Fourth Proportional to 81,793.71, 112,877.10 and 49,980.15

Step by Step Solution

1. Step 1: Write the proportion equation
   81,793.71 : 112,877.10 = 49,980.15 : x
2. Step 2: Convert to fraction form
   81,793.71/112,877.10 = 49,980.15/x
3. Step 3: Cross multiply
   81,793.71x = 112,877.10 × 49,980.15
4. Step 4: Simplify right side
   81,793.71x = 5,641,614,389.57
5. Step 5: Solve for x
   x = 5,641,614,389.57/81,793.71
6. Step 6: Final answer
   x = 68,973.69