Finding the Third Proportional to 212,237.72 and 315,469.69

Step by Step Solution

1. Step 1: Write the proportion equation
   212,237.72 : 315,469.69 = 315,469.69 : x
2. Step 2: Convert to fraction form
   212,237.72/315,469.69 = 315,469.69/x
3. Step 3: Cross multiply
   212,237.72x = 315,469.69 × 315,469.69
4. Step 4: Simplify right side
   212,237.72x = 99,521,123,731.35
5. Step 5: Solve for x
   x = 99,521,123,731.35/212,237.72
6. Step 6: Final answer
   x = 468,913.46