Finding the Fourth Proportional to 2,217.60, 3,321.54 and 1,434.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217.60 : 3,321.54 = 1,434.87 : x
2. Step 2: Convert to fraction form
   2,217.60/3,321.54 = 1,434.87/x
3. Step 3: Cross multiply
   2,217.60x = 3,321.54 × 1,434.87
4. Step 4: Simplify right side
   2,217.60x = 4,765,978.10
5. Step 5: Solve for x
   x = 4,765,978.10/2,217.60
6. Step 6: Final answer
   x = 2,149.16