Finding the Fourth Proportional to 2,632.89, 3,949.34 and 685.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,632.89 : 3,949.34 = 685.05 : x
2. Step 2: Convert to fraction form
   2,632.89/3,949.34 = 685.05/x
3. Step 3: Cross multiply
   2,632.89x = 3,949.34 × 685.05
4. Step 4: Simplify right side
   2,632.89x = 2,705,495.37
5. Step 5: Solve for x
   x = 2,705,495.37/2,632.89
6. Step 6: Final answer
   x = 1,027.58