Finding the Third Proportional to 5,470,912 and 12,665,240

Step by Step Solution

1. Step 1: Write the proportion equation
   5,470,912 : 12,665,240 = 12,665,240 : x
2. Step 2: Convert to fraction form
   5,470,912/12,665,240 = 12,665,240/x
3. Step 3: Cross multiply
   5,470,912x = 12,665,240 × 12,665,240
4. Step 4: Simplify right side
   5,470,912x = 160,408,304,257,600
5. Step 5: Solve for x
   x = 160,408,304,257,600/5,470,912
6. Step 6: Final answer
   x = 29,320,212.84