Finding the Third Proportional to 212,087 and 311,002

Step by Step Solution

1. Step 1: Write the proportion equation
   212,087 : 311,002 = 311,002 : x
2. Step 2: Convert to fraction form
   212,087/311,002 = 311,002/x
3. Step 3: Cross multiply
   212,087x = 311,002 × 311,002
4. Step 4: Simplify right side
   212,087x = 96,722,244,004
5. Step 5: Solve for x
   x = 96,722,244,004/212,087
6. Step 6: Final answer
   x = 456,049.85