Finding the Third Proportional to 8,648,478 and 13,265,910

Step by Step Solution

1. Step 1: Write the proportion equation
   8,648,478 : 13,265,910 = 13,265,910 : x
2. Step 2: Convert to fraction form
   8,648,478/13,265,910 = 13,265,910/x
3. Step 3: Cross multiply
   8,648,478x = 13,265,910 × 13,265,910
4. Step 4: Simplify right side
   8,648,478x = 175,984,368,128,100
5. Step 5: Solve for x
   x = 175,984,368,128,100/8,648,478
6. Step 6: Final answer
   x = 20,348,594.07