Finding the Fourth Proportional to 2,620.38, 3,616.02 and 1,425.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.38 : 3,616.02 = 1,425.31 : x
2. Step 2: Convert to fraction form
   2,620.38/3,616.02 = 1,425.31/x
3. Step 3: Cross multiply
   2,620.38x = 3,616.02 × 1,425.31
4. Step 4: Simplify right side
   2,620.38x = 5,153,949.47
5. Step 5: Solve for x
   x = 5,153,949.47/2,620.38
6. Step 6: Final answer
   x = 1,966.87