Finding the Fourth Proportional to 2,251.33, 3,376.89 and 691.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,251.33 : 3,376.89 = 691.27 : x
2. Step 2: Convert to fraction form
   2,251.33/3,376.89 = 691.27/x
3. Step 3: Cross multiply
   2,251.33x = 3,376.89 × 691.27
4. Step 4: Simplify right side
   2,251.33x = 2,334,334.31
5. Step 5: Solve for x
   x = 2,334,334.31/2,251.33
6. Step 6: Final answer
   x = 1,036.87