Finding the Fourth Proportional to 1,162.52, 1,605.69 and 869.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.52 : 1,605.69 = 869.09 : x
2. Step 2: Convert to fraction form
   1,162.52/1,605.69 = 869.09/x
3. Step 3: Cross multiply
   1,162.52x = 1,605.69 × 869.09
4. Step 4: Simplify right side
   1,162.52x = 1,395,481.09
5. Step 5: Solve for x
   x = 1,395,481.09/1,162.52
6. Step 6: Final answer
   x = 1,200.40