Finding the Third Proportional to 99,745.50 and 218,568

Step by Step Solution

1. Step 1: Write the proportion equation
   99,745.50 : 218,568 = 218,568 : x
2. Step 2: Convert to fraction form
   99,745.50/218,568 = 218,568/x
3. Step 3: Cross multiply
   99,745.50x = 218,568 × 218,568
4. Step 4: Simplify right side
   99,745.50x = 47,771,970,624
5. Step 5: Solve for x
   x = 47,771,970,624/99,745.50
6. Step 6: Final answer
   x = 478,938.60