Finding the Fourth Proportional to 21,414.27, 32,158.16 and 13,142.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,414.27 : 32,158.16 = 13,142.86 : x
2. Step 2: Convert to fraction form
   21,414.27/32,158.16 = 13,142.86/x
3. Step 3: Cross multiply
   21,414.27x = 32,158.16 × 13,142.86
4. Step 4: Simplify right side
   21,414.27x = 422,650,194.74
5. Step 5: Solve for x
   x = 422,650,194.74/21,414.27
6. Step 6: Final answer
   x = 19,736.85