Finding the Third Proportional to 111,979,109 and 173,864,339

Step by Step Solution

1. Step 1: Write the proportion equation
   111,979,109 : 173,864,339 = 173,864,339 : x
2. Step 2: Convert to fraction form
   111,979,109/173,864,339 = 173,864,339/x
3. Step 3: Cross multiply
   111,979,109x = 173,864,339 × 173,864,339
4. Step 4: Simplify right side
   111,979,109x = 30,228,808,375,906,920
5. Step 5: Solve for x
   x = 30,228,808,375,906,920/111,979,109
6. Step 6: Final answer
   x = 269,950,427.77