Finding the Fourth Proportional to 1,425.72, 1,966.82 and 928.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,425.72 : 1,966.82 = 928.18 : x
2. Step 2: Convert to fraction form
   1,425.72/1,966.82 = 928.18/x
3. Step 3: Cross multiply
   1,425.72x = 1,966.82 × 928.18
4. Step 4: Simplify right side
   1,425.72x = 1,825,548.51
5. Step 5: Solve for x
   x = 1,825,548.51/1,425.72
6. Step 6: Final answer
   x = 1,280.44