Finding the Fourth Proportional to 2,443.15, 3,664.34 and 688.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,443.15 : 3,664.34 = 688.29 : x
2. Step 2: Convert to fraction form
   2,443.15/3,664.34 = 688.29/x
3. Step 3: Cross multiply
   2,443.15x = 3,664.34 × 688.29
4. Step 4: Simplify right side
   2,443.15x = 2,522,128.58
5. Step 5: Solve for x
   x = 2,522,128.58/2,443.15
6. Step 6: Final answer
   x = 1,032.33