Finding the Fourth Proportional to 1,128.92, 1,685.20 and 975.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.92 : 1,685.20 = 975.83 : x
2. Step 2: Convert to fraction form
   1,128.92/1,685.20 = 975.83/x
3. Step 3: Cross multiply
   1,128.92x = 1,685.20 × 975.83
4. Step 4: Simplify right side
   1,128.92x = 1,644,468.72
5. Step 5: Solve for x
   x = 1,644,468.72/1,128.92
6. Step 6: Final answer
   x = 1,456.67