Finding the Fourth Proportional to 2,150.22, 3,223.74 and 688.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.22 : 3,223.74 = 688.54 : x
2. Step 2: Convert to fraction form
   2,150.22/3,223.74 = 688.54/x
3. Step 3: Cross multiply
   2,150.22x = 3,223.74 × 688.54
4. Step 4: Simplify right side
   2,150.22x = 2,219,673.94
5. Step 5: Solve for x
   x = 2,219,673.94/2,150.22
6. Step 6: Final answer
   x = 1,032.30