Finding the Fourth Proportional to 1,662.60, 2,498.76 and 1,643.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.60 : 2,498.76 = 1,643.16 : x
2. Step 2: Convert to fraction form
   1,662.60/2,498.76 = 1,643.16/x
3. Step 3: Cross multiply
   1,662.60x = 2,498.76 × 1,643.16
4. Step 4: Simplify right side
   1,662.60x = 4,105,862.48
5. Step 5: Solve for x
   x = 4,105,862.48/1,662.60
6. Step 6: Final answer
   x = 2,469.54