Finding the Fourth Proportional to 1,259.49, 1,737.61 and 928.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,259.49 : 1,737.61 = 928.71 : x
2. Step 2: Convert to fraction form
   1,259.49/1,737.61 = 928.71/x
3. Step 3: Cross multiply
   1,259.49x = 1,737.61 × 928.71
4. Step 4: Simplify right side
   1,259.49x = 1,613,735.78
5. Step 5: Solve for x
   x = 1,613,735.78/1,259.49
6. Step 6: Final answer
   x = 1,281.26