Finding the Fourth Proportional to 2,152.88, 3,229.63 and 691.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.88 : 3,229.63 = 691.69 : x
2. Step 2: Convert to fraction form
   2,152.88/3,229.63 = 691.69/x
3. Step 3: Cross multiply
   2,152.88x = 3,229.63 × 691.69
4. Step 4: Simplify right side
   2,152.88x = 2,233,892.97
5. Step 5: Solve for x
   x = 2,233,892.97/2,152.88
6. Step 6: Final answer
   x = 1,037.63