Finding the Fourth Proportional to 2,559.40, 3,532.15 and 1,425.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,559.40 : 3,532.15 = 1,425.22 : x
2. Step 2: Convert to fraction form
   2,559.40/3,532.15 = 1,425.22/x
3. Step 3: Cross multiply
   2,559.40x = 3,532.15 × 1,425.22
4. Step 4: Simplify right side
   2,559.40x = 5,034,090.82
5. Step 5: Solve for x
   x = 5,034,090.82/2,559.40
6. Step 6: Final answer
   x = 1,966.90