Finding the Fourth Proportional to 2,144.20, 3,216.70 and 738.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.20 : 3,216.70 = 738.24 : x
2. Step 2: Convert to fraction form
   2,144.20/3,216.70 = 738.24/x
3. Step 3: Cross multiply
   2,144.20x = 3,216.70 × 738.24
4. Step 4: Simplify right side
   2,144.20x = 2,374,686.72
5. Step 5: Solve for x
   x = 2,374,686.72/2,144.20
6. Step 6: Final answer
   x = 1,107.50