Finding the Fourth Proportional to 1,353.97, 1,868.68 and 980.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.97 : 1,868.68 = 980.81 : x
2. Step 2: Convert to fraction form
   1,353.97/1,868.68 = 980.81/x
3. Step 3: Cross multiply
   1,353.97x = 1,868.68 × 980.81
4. Step 4: Simplify right side
   1,353.97x = 1,832,820.03
5. Step 5: Solve for x
   x = 1,832,820.03/1,353.97
6. Step 6: Final answer
   x = 1,353.66