Finding the Fourth Proportional to 1,422.18, 2,132.71 and 691.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.18 : 2,132.71 = 691.54 : x
2. Step 2: Convert to fraction form
   1,422.18/2,132.71 = 691.54/x
3. Step 3: Cross multiply
   1,422.18x = 2,132.71 × 691.54
4. Step 4: Simplify right side
   1,422.18x = 1,474,854.27
5. Step 5: Solve for x
   x = 1,474,854.27/1,422.18
6. Step 6: Final answer
   x = 1,037.04