Finding the Fourth Proportional to 1,150.80, 1,587.48 and 684.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.80 : 1,587.48 = 684.96 : x
2. Step 2: Convert to fraction form
   1,150.80/1,587.48 = 684.96/x
3. Step 3: Cross multiply
   1,150.80x = 1,587.48 × 684.96
4. Step 4: Simplify right side
   1,150.80x = 1,087,360.30
5. Step 5: Solve for x
   x = 1,087,360.30/1,150.80
6. Step 6: Final answer
   x = 944.87