Finding the Fourth Proportional to 1,425.97, 1,967.16 and 928.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,425.97 : 1,967.16 = 928.43 : x
2. Step 2: Convert to fraction form
   1,425.97/1,967.16 = 928.43/x
3. Step 3: Cross multiply
   1,425.97x = 1,967.16 × 928.43
4. Step 4: Simplify right side
   1,425.97x = 1,826,360.52
5. Step 5: Solve for x
   x = 1,826,360.52/1,425.97
6. Step 6: Final answer
   x = 1,280.78