Finding the Third Proportional to 2,309,618,312 and 5,389,295,636

Step by Step Solution

1. Step 1: Write the proportion equation
   2,309,618,312 : 5,389,295,636 = 5,389,295,636 : x
2. Step 2: Convert to fraction form
   2,309,618,312/5,389,295,636 = 5,389,295,636/x
3. Step 3: Cross multiply
   2,309,618,312x = 5,389,295,636 × 5,389,295,636
4. Step 4: Simplify right side
   2,309,618,312x = 29,044,507,452,208,644,096
5. Step 5: Solve for x
   x = 29,044,507,452,208,644,096/2,309,618,312
6. Step 6: Final answer
   x = 12,575,457,728.80