Finding the Third Proportional to 5,507,664 and 8,419,248

Step by Step Solution

1. Step 1: Write the proportion equation
   5,507,664 : 8,419,248 = 8,419,248 : x
2. Step 2: Convert to fraction form
   5,507,664/8,419,248 = 8,419,248/x
3. Step 3: Cross multiply
   5,507,664x = 8,419,248 × 8,419,248
4. Step 4: Simplify right side
   5,507,664x = 70,883,736,885,504
5. Step 5: Solve for x
   x = 70,883,736,885,504/5,507,664
6. Step 6: Final answer
   x = 12,870,018.38