Finding the Third Proportional to 399.25 and 883.50

Step by Step Solution

1. Step 1: Write the proportion equation
   399.25 : 883.50 = 883.50 : x
2. Step 2: Convert to fraction form
   399.25/883.50 = 883.50/x
3. Step 3: Cross multiply
   399.25x = 883.50 × 883.50
4. Step 4: Simplify right side
   399.25x = 780,572.25
5. Step 5: Solve for x
   x = 780,572.25/399.25
6. Step 6: Final answer
   x = 1,955.10