Finding the Fourth Proportional to 21,650.50, 29,877.69 and 12,218.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,650.50 : 29,877.69 = 12,218.86 : x
2. Step 2: Convert to fraction form
   21,650.50/29,877.69 = 12,218.86/x
3. Step 3: Cross multiply
   21,650.50x = 29,877.69 × 12,218.86
4. Step 4: Simplify right side
   21,650.50x = 365,071,311.23
5. Step 5: Solve for x
   x = 365,071,311.23/21,650.50
6. Step 6: Final answer
   x = 16,862.03