Finding the Third Proportional to 98,388.50 and 217,450

Step by Step Solution

1. Step 1: Write the proportion equation
   98,388.50 : 217,450 = 217,450 : x
2. Step 2: Convert to fraction form
   98,388.50/217,450 = 217,450/x
3. Step 3: Cross multiply
   98,388.50x = 217,450 × 217,450
4. Step 4: Simplify right side
   98,388.50x = 47,284,502,500
5. Step 5: Solve for x
   x = 47,284,502,500/98,388.50
6. Step 6: Final answer
   x = 480,589.73