Finding the Fourth Proportional to 14,150.85, 21,223.92 and 4,287.78

Step by Step Solution

1. Step 1: Write the proportion equation
   14,150.85 : 21,223.92 = 4,287.78 : x
2. Step 2: Convert to fraction form
   14,150.85/21,223.92 = 4,287.78/x
3. Step 3: Cross multiply
   14,150.85x = 21,223.92 × 4,287.78
4. Step 4: Simplify right side
   14,150.85x = 91,003,499.70
5. Step 5: Solve for x
   x = 91,003,499.70/14,150.85
6. Step 6: Final answer
   x = 6,430.96