Finding the Fourth Proportional to 1,373.59, 2,060.62 and 680.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,373.59 : 2,060.62 = 680.28 : x
2. Step 2: Convert to fraction form
   1,373.59/2,060.62 = 680.28/x
3. Step 3: Cross multiply
   1,373.59x = 2,060.62 × 680.28
4. Step 4: Simplify right side
   1,373.59x = 1,401,798.57
5. Step 5: Solve for x
   x = 1,401,798.57/1,373.59
6. Step 6: Final answer
   x = 1,020.54