Finding the Fourth Proportional to 1,426.08, 1,966.80 and 928.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.08 : 1,966.80 = 928.48 : x
2. Step 2: Convert to fraction form
   1,426.08/1,966.80 = 928.48/x
3. Step 3: Cross multiply
   1,426.08x = 1,966.80 × 928.48
4. Step 4: Simplify right side
   1,426.08x = 1,826,134.46
5. Step 5: Solve for x
   x = 1,826,134.46/1,426.08
6. Step 6: Final answer
   x = 1,280.53