Finding the Fourth Proportional to 1,397.92, 1,928.72 and 932

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.92 : 1,928.72 = 932 : x
2. Step 2: Convert to fraction form
   1,397.92/1,928.72 = 932/x
3. Step 3: Cross multiply
   1,397.92x = 1,928.72 × 932
4. Step 4: Simplify right side
   1,397.92x = 1,797,567.04
5. Step 5: Solve for x
   x = 1,797,567.04/1,397.92
6. Step 6: Final answer
   x = 1,285.89