Finding the Fourth Proportional to 1,133.07, 1,563.69 and 685.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,133.07 : 1,563.69 = 685.05 : x
2. Step 2: Convert to fraction form
   1,133.07/1,563.69 = 685.05/x
3. Step 3: Cross multiply
   1,133.07x = 1,563.69 × 685.05
4. Step 4: Simplify right side
   1,133.07x = 1,071,205.83
5. Step 5: Solve for x
   x = 1,071,205.83/1,133.07
6. Step 6: Final answer
   x = 945.40