Finding the Fourth Proportional to 21,375.54, 29,499.12 and 13,414.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,375.54 : 29,499.12 = 13,414.86 : x
2. Step 2: Convert to fraction form
   21,375.54/29,499.12 = 13,414.86/x
3. Step 3: Cross multiply
   21,375.54x = 29,499.12 × 13,414.86
4. Step 4: Simplify right side
   21,375.54x = 395,726,564.92
5. Step 5: Solve for x
   x = 395,726,564.92/21,375.54
6. Step 6: Final answer
   x = 18,513.06