Finding the Third Proportional to 12,156,728 and 19,249,860

Step by Step Solution

1. Step 1: Write the proportion equation
   12,156,728 : 19,249,860 = 19,249,860 : x
2. Step 2: Convert to fraction form
   12,156,728/19,249,860 = 19,249,860/x
3. Step 3: Cross multiply
   12,156,728x = 19,249,860 × 19,249,860
4. Step 4: Simplify right side
   12,156,728x = 370,557,110,019,600
5. Step 5: Solve for x
   x = 370,557,110,019,600/12,156,728
6. Step 6: Final answer
   x = 30,481,648.52