Finding the Fourth Proportional to 1,421.82, 1,962.23 and 979.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,421.82 : 1,962.23 = 979.97 : x
2. Step 2: Convert to fraction form
   1,421.82/1,962.23 = 979.97/x
3. Step 3: Cross multiply
   1,421.82x = 1,962.23 × 979.97
4. Step 4: Simplify right side
   1,421.82x = 1,922,911.82
5. Step 5: Solve for x
   x = 1,922,911.82/1,421.82
6. Step 6: Final answer
   x = 1,352.43