Finding the Fourth Proportional to 1,322.20, 1,982.82 and 672.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,322.20 : 1,982.82 = 672.82 : x
2. Step 2: Convert to fraction form
   1,322.20/1,982.82 = 672.82/x
3. Step 3: Cross multiply
   1,322.20x = 1,982.82 × 672.82
4. Step 4: Simplify right side
   1,322.20x = 1,334,080.95
5. Step 5: Solve for x
   x = 1,334,080.95/1,322.20
6. Step 6: Final answer
   x = 1,008.99