Finding the Fourth Proportional to 799.72, 1,103.22 and 689.01

Step by Step Solution

1. Step 1: Write the proportion equation
   799.72 : 1,103.22 = 689.01 : x
2. Step 2: Convert to fraction form
   799.72/1,103.22 = 689.01/x
3. Step 3: Cross multiply
   799.72x = 1,103.22 × 689.01
4. Step 4: Simplify right side
   799.72x = 760,128.06
5. Step 5: Solve for x
   x = 760,128.06/799.72
6. Step 6: Final answer
   x = 950.49