Finding the Third Proportional to 5,420,242 and 8,397,664

Step by Step Solution

1. Step 1: Write the proportion equation
   5,420,242 : 8,397,664 = 8,397,664 : x
2. Step 2: Convert to fraction form
   5,420,242/8,397,664 = 8,397,664/x
3. Step 3: Cross multiply
   5,420,242x = 8,397,664 × 8,397,664
4. Step 4: Simplify right side
   5,420,242x = 70,520,760,656,896
5. Step 5: Solve for x
   x = 70,520,760,656,896/5,420,242
6. Step 6: Final answer
   x = 13,010,629.54