Finding the Fourth Proportional to 2,152.89, 3,229.64 and 691.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.89 : 3,229.64 = 691.55 : x
2. Step 2: Convert to fraction form
   2,152.89/3,229.64 = 691.55/x
3. Step 3: Cross multiply
   2,152.89x = 3,229.64 × 691.55
4. Step 4: Simplify right side
   2,152.89x = 2,233,437.94
5. Step 5: Solve for x
   x = 2,233,437.94/2,152.89
6. Step 6: Final answer
   x = 1,037.41