Finding the Third Proportional to 12,728,588 and 19,705,061

Step by Step Solution

1. Step 1: Write the proportion equation
   12,728,588 : 19,705,061 = 19,705,061 : x
2. Step 2: Convert to fraction form
   12,728,588/19,705,061 = 19,705,061/x
3. Step 3: Cross multiply
   12,728,588x = 19,705,061 × 19,705,061
4. Step 4: Simplify right side
   12,728,588x = 388,289,429,013,721
5. Step 5: Solve for x
   x = 388,289,429,013,721/12,728,588
6. Step 6: Final answer
   x = 30,505,302.63