Finding the Fourth Proportional to 1,321.89, 1,983.13 and 705.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,321.89 : 1,983.13 = 705.27 : x
2. Step 2: Convert to fraction form
   1,321.89/1,983.13 = 705.27/x
3. Step 3: Cross multiply
   1,321.89x = 1,983.13 × 705.27
4. Step 4: Simplify right side
   1,321.89x = 1,398,642.10
5. Step 5: Solve for x
   x = 1,398,642.10/1,321.89
6. Step 6: Final answer
   x = 1,058.06