Finding the Fourth Proportional to 1,648.18, 2,470.17 and 1,605.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.18 : 2,470.17 = 1,605.11 : x
2. Step 2: Convert to fraction form
   1,648.18/2,470.17 = 1,605.11/x
3. Step 3: Cross multiply
   1,648.18x = 2,470.17 × 1,605.11
4. Step 4: Simplify right side
   1,648.18x = 3,964,894.57
5. Step 5: Solve for x
   x = 3,964,894.57/1,648.18
6. Step 6: Final answer
   x = 2,405.63