Finding the Third Proportional to 8,408,664 and 12,985,632

Step by Step Solution

1. Step 1: Write the proportion equation
   8,408,664 : 12,985,632 = 12,985,632 : x
2. Step 2: Convert to fraction form
   8,408,664/12,985,632 = 12,985,632/x
3. Step 3: Cross multiply
   8,408,664x = 12,985,632 × 12,985,632
4. Step 4: Simplify right side
   8,408,664x = 168,626,638,439,424
5. Step 5: Solve for x
   x = 168,626,638,439,424/8,408,664
6. Step 6: Final answer
   x = 20,053,915.63