Finding the Fourth Proportional to 1,662.91, 2,489.55 and 1,296.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.91 : 2,489.55 = 1,296.61 : x
2. Step 2: Convert to fraction form
   1,662.91/2,489.55 = 1,296.61/x
3. Step 3: Cross multiply
   1,662.91x = 2,489.55 × 1,296.61
4. Step 4: Simplify right side
   1,662.91x = 3,227,975.43
5. Step 5: Solve for x
   x = 3,227,975.43/1,662.91
6. Step 6: Final answer
   x = 1,941.16