Finding the Fourth Proportional to 1,150.50, 1,587.87 and 685.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.50 : 1,587.87 = 685.02 : x
2. Step 2: Convert to fraction form
   1,150.50/1,587.87 = 685.02/x
3. Step 3: Cross multiply
   1,150.50x = 1,587.87 × 685.02
4. Step 4: Simplify right side
   1,150.50x = 1,087,722.71
5. Step 5: Solve for x
   x = 1,087,722.71/1,150.50
6. Step 6: Final answer
   x = 945.43