Finding the Third Proportional to 12,399,082,858 and 19,146,747,779

Step by Step Solution

1. Step 1: Write the proportion equation
   12,399,082,858 : 19,146,747,779 = 19,146,747,779 : x
2. Step 2: Convert to fraction form
   12,399,082,858/19,146,747,779 = 19,146,747,779/x
3. Step 3: Cross multiply
   12,399,082,858x = 19,146,747,779 × 19,146,747,779
4. Step 4: Simplify right side
   12,399,082,858x = 366,597,950,512,641,409,024
5. Step 5: Solve for x
   x = 366,597,950,512,641,409,024/12,399,082,858
6. Step 6: Final answer
   x = 29,566,537,679.53