Finding the Fourth Proportional to 1,373.67, 2,058.98 and 680.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,373.67 : 2,058.98 = 680.51 : x
2. Step 2: Convert to fraction form
   1,373.67/2,058.98 = 680.51/x
3. Step 3: Cross multiply
   1,373.67x = 2,058.98 × 680.51
4. Step 4: Simplify right side
   1,373.67x = 1,401,142.78
5. Step 5: Solve for x
   x = 1,401,142.78/1,373.67
6. Step 6: Final answer
   x = 1,020.00