Finding the Third Proportional to 249,110 and 396,571.50

Step by Step Solution

1. Step 1: Write the proportion equation
   249,110 : 396,571.50 = 396,571.50 : x
2. Step 2: Convert to fraction form
   249,110/396,571.50 = 396,571.50/x
3. Step 3: Cross multiply
   249,110x = 396,571.50 × 396,571.50
4. Step 4: Simplify right side
   249,110x = 157,268,954,612.25
5. Step 5: Solve for x
   x = 157,268,954,612.25/249,110
6. Step 6: Final answer
   x = 631,323.33