Finding the Fourth Proportional to 2,152.42, 3,229.11 and 691.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.42 : 3,229.11 = 691.56 : x
2. Step 2: Convert to fraction form
   2,152.42/3,229.11 = 691.56/x
3. Step 3: Cross multiply
   2,152.42x = 3,229.11 × 691.56
4. Step 4: Simplify right side
   2,152.42x = 2,233,123.31
5. Step 5: Solve for x
   x = 2,233,123.31/2,152.42
6. Step 6: Final answer
   x = 1,037.50