Finding the Third Proportional to 99,882 and 213,979

Step by Step Solution

1. Step 1: Write the proportion equation
   99,882 : 213,979 = 213,979 : x
2. Step 2: Convert to fraction form
   99,882/213,979 = 213,979/x
3. Step 3: Cross multiply
   99,882x = 213,979 × 213,979
4. Step 4: Simplify right side
   99,882x = 45,787,012,441
5. Step 5: Solve for x
   x = 45,787,012,441/99,882
6. Step 6: Final answer
   x = 458,411.05