Finding the Fourth Proportional to 1,665.24, 2,498.17 and 691.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.24 : 2,498.17 = 691.42 : x
2. Step 2: Convert to fraction form
   1,665.24/2,498.17 = 691.42/x
3. Step 3: Cross multiply
   1,665.24x = 2,498.17 × 691.42
4. Step 4: Simplify right side
   1,665.24x = 1,727,276.73
5. Step 5: Solve for x
   x = 1,727,276.73/1,665.24
6. Step 6: Final answer
   x = 1,037.25