Finding the Third Proportional to 214,150,880 and 288,939,820

Step by Step Solution

1. Step 1: Write the proportion equation
   214,150,880 : 288,939,820 = 288,939,820 : x
2. Step 2: Convert to fraction form
   214,150,880/288,939,820 = 288,939,820/x
3. Step 3: Cross multiply
   214,150,880x = 288,939,820 × 288,939,820
4. Step 4: Simplify right side
   214,150,880x = 83,486,219,581,632,400
5. Step 5: Solve for x
   x = 83,486,219,581,632,400/214,150,880
6. Step 6: Final answer
   x = 389,847,660.59