Finding the Fourth Proportional to 2,152.76, 3,229.35 and 691.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.76 : 3,229.35 = 691.57 : x
2. Step 2: Convert to fraction form
   2,152.76/3,229.35 = 691.57/x
3. Step 3: Cross multiply
   2,152.76x = 3,229.35 × 691.57
4. Step 4: Simplify right side
   2,152.76x = 2,233,321.58
5. Step 5: Solve for x
   x = 2,233,321.58/2,152.76
6. Step 6: Final answer
   x = 1,037.42