Finding the Fourth Proportional to 80,981.34, 121,474.86 and 21,818.44

Step by Step Solution

1. Step 1: Write the proportion equation
   80,981.34 : 121,474.86 = 21,818.44 : x
2. Step 2: Convert to fraction form
   80,981.34/121,474.86 = 21,818.44/x
3. Step 3: Cross multiply
   80,981.34x = 121,474.86 × 21,818.44
4. Step 4: Simplify right side
   80,981.34x = 2,650,391,856.89
5. Step 5: Solve for x
   x = 2,650,391,856.89/80,981.34
6. Step 6: Final answer
   x = 32,728.42