Finding the Third Proportional to 221,442 and 324,781.50

Step by Step Solution

1. Step 1: Write the proportion equation
   221,442 : 324,781.50 = 324,781.50 : x
2. Step 2: Convert to fraction form
   221,442/324,781.50 = 324,781.50/x
3. Step 3: Cross multiply
   221,442x = 324,781.50 × 324,781.50
4. Step 4: Simplify right side
   221,442x = 105,483,022,742.25
5. Step 5: Solve for x
   x = 105,483,022,742.25/221,442
6. Step 6: Final answer
   x = 476,346.05