Finding the Third Proportional to 3,493,878 and 7,407,642

Step by Step Solution

1. Step 1: Write the proportion equation
   3,493,878 : 7,407,642 = 7,407,642 : x
2. Step 2: Convert to fraction form
   3,493,878/7,407,642 = 7,407,642/x
3. Step 3: Cross multiply
   3,493,878x = 7,407,642 × 7,407,642
4. Step 4: Simplify right side
   3,493,878x = 54,873,160,000,164
5. Step 5: Solve for x
   x = 54,873,160,000,164/3,493,878
6. Step 6: Final answer
   x = 15,705,516.91