Finding the Third Proportional to 7,981,588 and 12,171,664

Step by Step Solution

1. Step 1: Write the proportion equation
   7,981,588 : 12,171,664 = 12,171,664 : x
2. Step 2: Convert to fraction form
   7,981,588/12,171,664 = 12,171,664/x
3. Step 3: Cross multiply
   7,981,588x = 12,171,664 × 12,171,664
4. Step 4: Simplify right side
   7,981,588x = 148,149,404,528,896
5. Step 5: Solve for x
   x = 148,149,404,528,896/7,981,588
6. Step 6: Final answer
   x = 18,561,394.62