Finding the Fourth Proportional to 1,446.36, 1,995.98 and 783.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,446.36 : 1,995.98 = 783.21 : x
2. Step 2: Convert to fraction form
   1,446.36/1,995.98 = 783.21/x
3. Step 3: Cross multiply
   1,446.36x = 1,995.98 × 783.21
4. Step 4: Simplify right side
   1,446.36x = 1,563,257.60
5. Step 5: Solve for x
   x = 1,563,257.60/1,446.36
6. Step 6: Final answer
   x = 1,080.83