Finding the Fourth Proportional to 2,422.47, 3,633.89 and 691.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,422.47 : 3,633.89 = 691.23 : x
2. Step 2: Convert to fraction form
   2,422.47/3,633.89 = 691.23/x
3. Step 3: Cross multiply
   2,422.47x = 3,633.89 × 691.23
4. Step 4: Simplify right side
   2,422.47x = 2,511,850.33
5. Step 5: Solve for x
   x = 2,511,850.33/2,422.47
6. Step 6: Final answer
   x = 1,036.90