Finding the Fourth Proportional to 1,097.76, 1,647.56 and 869.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,097.76 : 1,647.56 = 869.04 : x
2. Step 2: Convert to fraction form
   1,097.76/1,647.56 = 869.04/x
3. Step 3: Cross multiply
   1,097.76x = 1,647.56 × 869.04
4. Step 4: Simplify right side
   1,097.76x = 1,431,797.72
5. Step 5: Solve for x
   x = 1,431,797.72/1,097.76
6. Step 6: Final answer
   x = 1,304.29