Finding the Fourth Proportional to 2,280.76, 3,417.90 and 1,665.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.76 : 3,417.90 = 1,665.88 : x
2. Step 2: Convert to fraction form
   2,280.76/3,417.90 = 1,665.88/x
3. Step 3: Cross multiply
   2,280.76x = 3,417.90 × 1,665.88
4. Step 4: Simplify right side
   2,280.76x = 5,693,811.25
5. Step 5: Solve for x
   x = 5,693,811.25/2,280.76
6. Step 6: Final answer
   x = 2,496.45