Finding the Fourth Proportional to 21,856.86, 32,660.85 and 16,411.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,856.86 : 32,660.85 = 16,411.72 : x
2. Step 2: Convert to fraction form
   21,856.86/32,660.85 = 16,411.72/x
3. Step 3: Cross multiply
   21,856.86x = 32,660.85 × 16,411.72
4. Step 4: Simplify right side
   21,856.86x = 536,020,725.16
5. Step 5: Solve for x
   x = 536,020,725.16/21,856.86
6. Step 6: Final answer
   x = 24,524.15