Finding the Fourth Proportional to 1,157.92, 1,596.72 and 862.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,157.92 : 1,596.72 = 862.72 : x
2. Step 2: Convert to fraction form
   1,157.92/1,596.72 = 862.72/x
3. Step 3: Cross multiply
   1,157.92x = 1,596.72 × 862.72
4. Step 4: Simplify right side
   1,157.92x = 1,377,522.28
5. Step 5: Solve for x
   x = 1,377,522.28/1,157.92
6. Step 6: Final answer
   x = 1,189.65