Finding the Fourth Proportional to 1,279.82, 1,767.03 and 980.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279.82 : 1,767.03 = 980.54 : x
2. Step 2: Convert to fraction form
   1,279.82/1,767.03 = 980.54/x
3. Step 3: Cross multiply
   1,279.82x = 1,767.03 × 980.54
4. Step 4: Simplify right side
   1,279.82x = 1,732,637.71
5. Step 5: Solve for x
   x = 1,732,637.71/1,279.82
6. Step 6: Final answer
   x = 1,353.82