Finding the Fourth Proportional to 2,152.58, 3,229.37 and 691.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.58 : 3,229.37 = 691.74 : x
2. Step 2: Convert to fraction form
   2,152.58/3,229.37 = 691.74/x
3. Step 3: Cross multiply
   2,152.58x = 3,229.37 × 691.74
4. Step 4: Simplify right side
   2,152.58x = 2,233,883.54
5. Step 5: Solve for x
   x = 2,233,883.54/2,152.58
6. Step 6: Final answer
   x = 1,037.77