Finding the Fourth Proportional to 80,866.71, 121,293.59 and 21,702.15

Step by Step Solution

1. Step 1: Write the proportion equation
   80,866.71 : 121,293.59 = 21,702.15 : x
2. Step 2: Convert to fraction form
   80,866.71/121,293.59 = 21,702.15/x
3. Step 3: Cross multiply
   80,866.71x = 121,293.59 × 21,702.15
4. Step 4: Simplify right side
   80,866.71x = 2,632,331,575.71
5. Step 5: Solve for x
   x = 2,632,331,575.71/80,866.71
6. Step 6: Final answer
   x = 32,551.49