Finding the Third Proportional to 212,845.50 and 458,910

Step by Step Solution

1. Step 1: Write the proportion equation
   212,845.50 : 458,910 = 458,910 : x
2. Step 2: Convert to fraction form
   212,845.50/458,910 = 458,910/x
3. Step 3: Cross multiply
   212,845.50x = 458,910 × 458,910
4. Step 4: Simplify right side
   212,845.50x = 210,598,388,100
5. Step 5: Solve for x
   x = 210,598,388,100/212,845.50
6. Step 6: Final answer
   x = 989,442.52