Finding the Third Proportional to 99,918 and 216,666

Step by Step Solution

1. Step 1: Write the proportion equation
   99,918 : 216,666 = 216,666 : x
2. Step 2: Convert to fraction form
   99,918/216,666 = 216,666/x
3. Step 3: Cross multiply
   99,918x = 216,666 × 216,666
4. Step 4: Simplify right side
   99,918x = 46,944,155,556
5. Step 5: Solve for x
   x = 46,944,155,556/99,918
6. Step 6: Final answer
   x = 469,826.81