Finding the Fourth Proportional to 1,446.31, 1,995.92 and 783.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,446.31 : 1,995.92 = 783.17 : x
2. Step 2: Convert to fraction form
   1,446.31/1,995.92 = 783.17/x
3. Step 3: Cross multiply
   1,446.31x = 1,995.92 × 783.17
4. Step 4: Simplify right side
   1,446.31x = 1,563,144.67
5. Step 5: Solve for x
   x = 1,563,144.67/1,446.31
6. Step 6: Final answer
   x = 1,080.78