Finding the Third Proportional to 3,787,872 and 8,137,920

Step by Step Solution

1. Step 1: Write the proportion equation
   3,787,872 : 8,137,920 = 8,137,920 : x
2. Step 2: Convert to fraction form
   3,787,872/8,137,920 = 8,137,920/x
3. Step 3: Cross multiply
   3,787,872x = 8,137,920 × 8,137,920
4. Step 4: Simplify right side
   3,787,872x = 66,225,741,926,400
5. Step 5: Solve for x
   x = 66,225,741,926,400/3,787,872
6. Step 6: Final answer
   x = 17,483,627.20