Finding the Third Proportional to 212,314.50 and 321,192

Step by Step Solution

1. Step 1: Write the proportion equation
   212,314.50 : 321,192 = 321,192 : x
2. Step 2: Convert to fraction form
   212,314.50/321,192 = 321,192/x
3. Step 3: Cross multiply
   212,314.50x = 321,192 × 321,192
4. Step 4: Simplify right side
   212,314.50x = 103,164,300,864
5. Step 5: Solve for x
   x = 103,164,300,864/212,314.50
6. Step 6: Final answer
   x = 485,903.23