Finding the Third Proportional to 99,196 and 209,912

Step by Step Solution

1. Step 1: Write the proportion equation
   99,196 : 209,912 = 209,912 : x
2. Step 2: Convert to fraction form
   99,196/209,912 = 209,912/x
3. Step 3: Cross multiply
   99,196x = 209,912 × 209,912
4. Step 4: Simplify right side
   99,196x = 44,063,047,744
5. Step 5: Solve for x
   x = 44,063,047,744/99,196
6. Step 6: Final answer
   x = 444,201.86