Finding the Third Proportional to 12,789,738 and 19,145,727

Step by Step Solution

1. Step 1: Write the proportion equation
   12,789,738 : 19,145,727 = 19,145,727 : x
2. Step 2: Convert to fraction form
   12,789,738/19,145,727 = 19,145,727/x
3. Step 3: Cross multiply
   12,789,738x = 19,145,727 × 19,145,727
4. Step 4: Simplify right side
   12,789,738x = 366,558,862,358,529
5. Step 5: Solve for x
   x = 366,558,862,358,529/12,789,738
6. Step 6: Final answer
   x = 28,660,388.69