Finding the Third Proportional to 5,420,238 and 8,397,657

Step by Step Solution

1. Step 1: Write the proportion equation
   5,420,238 : 8,397,657 = 8,397,657 : x
2. Step 2: Convert to fraction form
   5,420,238/8,397,657 = 8,397,657/x
3. Step 3: Cross multiply
   5,420,238x = 8,397,657 × 8,397,657
4. Step 4: Simplify right side
   5,420,238x = 70,520,643,089,649
5. Step 5: Solve for x
   x = 70,520,643,089,649/5,420,238
6. Step 6: Final answer
   x = 13,010,617.45