Finding the Third Proportional to 1,291,297,747.50 and 1,811,946,449.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291,297,747.50 : 1,811,946,449.25 = 1,811,946,449.25 : x
2. Step 2: Convert to fraction form
   1,291,297,747.50/1,811,946,449.25 = 1,811,946,449.25/x
3. Step 3: Cross multiply
   1,291,297,747.50x = 1,811,946,449.25 × 1,811,946,449.25
4. Step 4: Simplify right side
   1,291,297,747.50x = 3,283,149,934,949,682,688
5. Step 5: Solve for x
   x = 3,283,149,934,949,682,688/1,291,297,747.50
6. Step 6: Final answer
   x = 2,542,519,679.37