Finding the Fourth Proportional to 1,128.96, 1,691.23 and 659.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.96 : 1,691.23 = 659.27 : x
2. Step 2: Convert to fraction form
   1,128.96/1,691.23 = 659.27/x
3. Step 3: Cross multiply
   1,128.96x = 1,691.23 × 659.27
4. Step 4: Simplify right side
   1,128.96x = 1,114,977.20
5. Step 5: Solve for x
   x = 1,114,977.20/1,128.96
6. Step 6: Final answer
   x = 987.61