Finding the Third Proportional to 214,150,920 and 288,939,870

Step by Step Solution

1. Step 1: Write the proportion equation
   214,150,920 : 288,939,870 = 288,939,870 : x
2. Step 2: Convert to fraction form
   214,150,920/288,939,870 = 288,939,870/x
3. Step 3: Cross multiply
   214,150,920x = 288,939,870 × 288,939,870
4. Step 4: Simplify right side
   214,150,920x = 83,486,248,475,616,896
5. Step 5: Solve for x
   x = 83,486,248,475,616,896/214,150,920
6. Step 6: Final answer
   x = 389,847,722.70