Finding the Third Proportional to 8,690,134 and 13,147,048

Step by Step Solution

1. Step 1: Write the proportion equation
   8,690,134 : 13,147,048 = 13,147,048 : x
2. Step 2: Convert to fraction form
   8,690,134/13,147,048 = 13,147,048/x
3. Step 3: Cross multiply
   8,690,134x = 13,147,048 × 13,147,048
4. Step 4: Simplify right side
   8,690,134x = 172,844,871,114,304
5. Step 5: Solve for x
   x = 172,844,871,114,304/8,690,134
6. Step 6: Final answer
   x = 19,889,782.03