Finding the Fourth Proportional to 14,499, 19,978.98 and 13,714.80

Step by Step Solution

1. Step 1: Write the proportion equation
   14,499 : 19,978.98 = 13,714.80 : x
2. Step 2: Convert to fraction form
   14,499/19,978.98 = 13,714.80/x
3. Step 3: Cross multiply
   14,499x = 19,978.98 × 13,714.80
4. Step 4: Simplify right side
   14,499x = 274,007,714.90
5. Step 5: Solve for x
   x = 274,007,714.90/14,499
6. Step 6: Final answer
   x = 18,898.39