Finding the Third Proportional to 216,918 and 444,404.25

Step by Step Solution

1. Step 1: Write the proportion equation
   216,918 : 444,404.25 = 444,404.25 : x
2. Step 2: Convert to fraction form
   216,918/444,404.25 = 444,404.25/x
3. Step 3: Cross multiply
   216,918x = 444,404.25 × 444,404.25
4. Step 4: Simplify right side
   216,918x = 197,495,137,418.06
5. Step 5: Solve for x
   x = 197,495,137,418.06/216,918
6. Step 6: Final answer
   x = 910,459.89