Finding the Fourth Proportional to 2,503.40, 3,456.07 and 1,665.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,503.40 : 3,456.07 = 1,665.25 : x
2. Step 2: Convert to fraction form
   2,503.40/3,456.07 = 1,665.25/x
3. Step 3: Cross multiply
   2,503.40x = 3,456.07 × 1,665.25
4. Step 4: Simplify right side
   2,503.40x = 5,755,207.76
5. Step 5: Solve for x
   x = 5,755,207.76/2,503.40
6. Step 6: Final answer
   x = 2,298.96