Finding the Fourth Proportional to 2,540.92, 3,505.20 and 1,656.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.92 : 3,505.20 = 1,656.40 : x
2. Step 2: Convert to fraction form
   2,540.92/3,505.20 = 1,656.40/x
3. Step 3: Cross multiply
   2,540.92x = 3,505.20 × 1,656.40
4. Step 4: Simplify right side
   2,540.92x = 5,806,013.28
5. Step 5: Solve for x
   x = 5,806,013.28/2,540.92
6. Step 6: Final answer
   x = 2,285.00