Finding the Fourth Proportional to 2,152.27, 3,228.89 and 691.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.27 : 3,228.89 = 691.51 : x
2. Step 2: Convert to fraction form
   2,152.27/3,228.89 = 691.51/x
3. Step 3: Cross multiply
   2,152.27x = 3,228.89 × 691.51
4. Step 4: Simplify right side
   2,152.27x = 2,232,809.72
5. Step 5: Solve for x
   x = 2,232,809.72/2,152.27
6. Step 6: Final answer
   x = 1,037.42