Finding the Third Proportional to 3,686,878 and 8,049,129

Step by Step Solution

1. Step 1: Write the proportion equation
   3,686,878 : 8,049,129 = 8,049,129 : x
2. Step 2: Convert to fraction form
   3,686,878/8,049,129 = 8,049,129/x
3. Step 3: Cross multiply
   3,686,878x = 8,049,129 × 8,049,129
4. Step 4: Simplify right side
   3,686,878x = 64,788,477,658,641
5. Step 5: Solve for x
   x = 64,788,477,658,641/3,686,878
6. Step 6: Final answer
   x = 17,572,720.78