Finding the Fourth Proportional to 1,648.68, 2,470.92 and 1,605.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.68 : 2,470.92 = 1,605.61 : x
2. Step 2: Convert to fraction form
   1,648.68/2,470.92 = 1,605.61/x
3. Step 3: Cross multiply
   1,648.68x = 2,470.92 × 1,605.61
4. Step 4: Simplify right side
   1,648.68x = 3,967,333.86
5. Step 5: Solve for x
   x = 3,967,333.86/1,648.68
6. Step 6: Final answer
   x = 2,406.37