Finding the Third Proportional to 212,220 and 456,035.06

Step by Step Solution

1. Step 1: Write the proportion equation
   212,220 : 456,035.06 = 456,035.06 : x
2. Step 2: Convert to fraction form
   212,220/456,035.06 = 456,035.06/x
3. Step 3: Cross multiply
   212,220x = 456,035.06 × 456,035.06
4. Step 4: Simplify right side
   212,220x = 207,967,978,229.38
5. Step 5: Solve for x
   x = 207,967,978,229.38/212,220
6. Step 6: Final answer
   x = 979,964.09