Finding the Third Proportional to 3,872,484 and 8,416,620

Step by Step Solution

1. Step 1: Write the proportion equation
   3,872,484 : 8,416,620 = 8,416,620 : x
2. Step 2: Convert to fraction form
   3,872,484/8,416,620 = 8,416,620/x
3. Step 3: Cross multiply
   3,872,484x = 8,416,620 × 8,416,620
4. Step 4: Simplify right side
   3,872,484x = 70,839,492,224,400
5. Step 5: Solve for x
   x = 70,839,492,224,400/3,872,484
6. Step 6: Final answer
   x = 18,293,036.78