Finding the Fourth Proportional to 2,490.57, 3,436.90 and 1,607.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,490.57 : 3,436.90 = 1,607.27 : x
2. Step 2: Convert to fraction form
   2,490.57/3,436.90 = 1,607.27/x
3. Step 3: Cross multiply
   2,490.57x = 3,436.90 × 1,607.27
4. Step 4: Simplify right side
   2,490.57x = 5,524,005.06
5. Step 5: Solve for x
   x = 5,524,005.06/2,490.57
6. Step 6: Final answer
   x = 2,217.97