Finding the Third Proportional to 326,211 and 476,728.50

Step by Step Solution

1. Step 1: Write the proportion equation
   326,211 : 476,728.50 = 476,728.50 : x
2. Step 2: Convert to fraction form
   326,211/476,728.50 = 476,728.50/x
3. Step 3: Cross multiply
   326,211x = 476,728.50 × 476,728.50
4. Step 4: Simplify right side
   326,211x = 227,270,062,712.25
5. Step 5: Solve for x
   x = 227,270,062,712.25/326,211
6. Step 6: Final answer
   x = 696,696.50