Finding the Third Proportional to 3,872,492 and 8,416,636

Step by Step Solution

1. Step 1: Write the proportion equation
   3,872,492 : 8,416,636 = 8,416,636 : x
2. Step 2: Convert to fraction form
   3,872,492/8,416,636 = 8,416,636/x
3. Step 3: Cross multiply
   3,872,492x = 8,416,636 × 8,416,636
4. Step 4: Simplify right side
   3,872,492x = 70,839,761,556,496
5. Step 5: Solve for x
   x = 70,839,761,556,496/3,872,492
6. Step 6: Final answer
   x = 18,293,068.53