Finding the Third Proportional to 269,218.50 and 416,808

Step by Step Solution

1. Step 1: Write the proportion equation
   269,218.50 : 416,808 = 416,808 : x
2. Step 2: Convert to fraction form
   269,218.50/416,808 = 416,808/x
3. Step 3: Cross multiply
   269,218.50x = 416,808 × 416,808
4. Step 4: Simplify right side
   269,218.50x = 173,728,908,864
5. Step 5: Solve for x
   x = 173,728,908,864/269,218.50
6. Step 6: Final answer
   x = 645,308.21