Finding the Third Proportional to 3,989,523 and 8,776,086

Step by Step Solution

1. Step 1: Write the proportion equation
   3,989,523 : 8,776,086 = 8,776,086 : x
2. Step 2: Convert to fraction form
   3,989,523/8,776,086 = 8,776,086/x
3. Step 3: Cross multiply
   3,989,523x = 8,776,086 × 8,776,086
4. Step 4: Simplify right side
   3,989,523x = 77,019,685,479,396
5. Step 5: Solve for x
   x = 77,019,685,479,396/3,989,523
6. Step 6: Final answer
   x = 19,305,487.27