Finding the Third Proportional to 214,150,910 and 288,939,864

Step by Step Solution

1. Step 1: Write the proportion equation
   214,150,910 : 288,939,864 = 288,939,864 : x
2. Step 2: Convert to fraction form
   214,150,910/288,939,864 = 288,939,864/x
3. Step 3: Cross multiply
   214,150,910x = 288,939,864 × 288,939,864
4. Step 4: Simplify right side
   214,150,910x = 83,486,245,008,338,496
5. Step 5: Solve for x
   x = 83,486,245,008,338,496/214,150,910
6. Step 6: Final answer
   x = 389,847,724.71