Finding the Fourth Proportional to 14,142.71, 21,209.10 and 4,144.71

Step by Step Solution

1. Step 1: Write the proportion equation
   14,142.71 : 21,209.10 = 4,144.71 : x
2. Step 2: Convert to fraction form
   14,142.71/21,209.10 = 4,144.71/x
3. Step 3: Cross multiply
   14,142.71x = 21,209.10 × 4,144.71
4. Step 4: Simplify right side
   14,142.71x = 87,905,568.86
5. Step 5: Solve for x
   x = 87,905,568.86/14,142.71
6. Step 6: Final answer
   x = 6,215.61