Finding the Fourth Proportional to 1,132.80, 1,562.04 and 870.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,132.80 : 1,562.04 = 870.24 : x
2. Step 2: Convert to fraction form
   1,132.80/1,562.04 = 870.24/x
3. Step 3: Cross multiply
   1,132.80x = 1,562.04 × 870.24
4. Step 4: Simplify right side
   1,132.80x = 1,359,349.69
5. Step 5: Solve for x
   x = 1,359,349.69/1,132.80
6. Step 6: Final answer
   x = 1,199.99