Finding the Fourth Proportional to 14,287.16, 21,404.82 and 13,976.12

Step by Step Solution

1. Step 1: Write the proportion equation
   14,287.16 : 21,404.82 = 13,976.12 : x
2. Step 2: Convert to fraction form
   14,287.16/21,404.82 = 13,976.12/x
3. Step 3: Cross multiply
   14,287.16x = 21,404.82 × 13,976.12
4. Step 4: Simplify right side
   14,287.16x = 299,156,332.90
5. Step 5: Solve for x
   x = 299,156,332.90/14,287.16
6. Step 6: Final answer
   x = 20,938.82