Finding the Fourth Proportional to 1,348.72, 1,859.46 and 928.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,348.72 : 1,859.46 = 928.30 : x
2. Step 2: Convert to fraction form
   1,348.72/1,859.46 = 928.30/x
3. Step 3: Cross multiply
   1,348.72x = 1,859.46 × 928.30
4. Step 4: Simplify right side
   1,348.72x = 1,726,136.72
5. Step 5: Solve for x
   x = 1,726,136.72/1,348.72
6. Step 6: Final answer
   x = 1,279.83