Finding the Third Proportional to 1,997,216,778.09 and 4,342,059,811.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,997,216,778.09 : 4,342,059,811.69 = 4,342,059,811.69 : x
2. Step 2: Convert to fraction form
   1,997,216,778.09/4,342,059,811.69 = 4,342,059,811.69/x
3. Step 3: Cross multiply
   1,997,216,778.09x = 4,342,059,811.69 × 4,342,059,811.69
4. Step 4: Simplify right side
   1,997,216,778.09x = 18,853,483,408,271,687,680
5. Step 5: Solve for x
   x = 18,853,483,408,271,687,680/1,997,216,778.09
6. Step 6: Final answer
   x = 9,439,878,342.23