Finding the Third Proportional to 12,791,089 and 19,680,669

Step by Step Solution

1. Step 1: Write the proportion equation
   12,791,089 : 19,680,669 = 19,680,669 : x
2. Step 2: Convert to fraction form
   12,791,089/19,680,669 = 19,680,669/x
3. Step 3: Cross multiply
   12,791,089x = 19,680,669 × 19,680,669
4. Step 4: Simplify right side
   12,791,089x = 387,328,732,287,561
5. Step 5: Solve for x
   x = 387,328,732,287,561/12,791,089
6. Step 6: Final answer
   x = 30,281,138.09