Finding the Fourth Proportional to 1,150.61, 1,587.83 and 684.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.61 : 1,587.83 = 684.86 : x
2. Step 2: Convert to fraction form
   1,150.61/1,587.83 = 684.86/x
3. Step 3: Cross multiply
   1,150.61x = 1,587.83 × 684.86
4. Step 4: Simplify right side
   1,150.61x = 1,087,429.89
5. Step 5: Solve for x
   x = 1,087,429.89/1,150.61
6. Step 6: Final answer
   x = 945.09