Finding the Third Proportional to 3,867,768 and 8,378,352

Step by Step Solution

1. Step 1: Write the proportion equation
   3,867,768 : 8,378,352 = 8,378,352 : x
2. Step 2: Convert to fraction form
   3,867,768/8,378,352 = 8,378,352/x
3. Step 3: Cross multiply
   3,867,768x = 8,378,352 × 8,378,352
4. Step 4: Simplify right side
   3,867,768x = 70,196,782,235,904
5. Step 5: Solve for x
   x = 70,196,782,235,904/3,867,768
6. Step 6: Final answer
   x = 18,149,170.85