Finding the Third Proportional to 3,920,647 and 8,492,887

Step by Step Solution

1. Step 1: Write the proportion equation
   3,920,647 : 8,492,887 = 8,492,887 : x
2. Step 2: Convert to fraction form
   3,920,647/8,492,887 = 8,492,887/x
3. Step 3: Cross multiply
   3,920,647x = 8,492,887 × 8,492,887
4. Step 4: Simplify right side
   3,920,647x = 72,129,129,594,769
5. Step 5: Solve for x
   x = 72,129,129,594,769/3,920,647
6. Step 6: Final answer
   x = 18,397,251.68