Finding the Fourth Proportional to 1,348.23, 1,859.56 and 928.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,348.23 : 1,859.56 = 928.72 : x
2. Step 2: Convert to fraction form
   1,348.23/1,859.56 = 928.72/x
3. Step 3: Cross multiply
   1,348.23x = 1,859.56 × 928.72
4. Step 4: Simplify right side
   1,348.23x = 1,727,010.57
5. Step 5: Solve for x
   x = 1,727,010.57/1,348.23
6. Step 6: Final answer
   x = 1,280.94