Finding the Fourth Proportional to 14,345.98, 21,374.78 and 13,540.24

Step by Step Solution

1. Step 1: Write the proportion equation
   14,345.98 : 21,374.78 = 13,540.24 : x
2. Step 2: Convert to fraction form
   14,345.98/21,374.78 = 13,540.24/x
3. Step 3: Cross multiply
   14,345.98x = 21,374.78 × 13,540.24
4. Step 4: Simplify right side
   14,345.98x = 289,419,651.15
5. Step 5: Solve for x
   x = 289,419,651.15/14,345.98
6. Step 6: Final answer
   x = 20,174.27