Finding the Third Proportional to 11,915,471 and 25,457,556

Step by Step Solution

1. Step 1: Write the proportion equation
   11,915,471 : 25,457,556 = 25,457,556 : x
2. Step 2: Convert to fraction form
   11,915,471/25,457,556 = 25,457,556/x
3. Step 3: Cross multiply
   11,915,471x = 25,457,556 × 25,457,556
4. Step 4: Simplify right side
   11,915,471x = 648,087,157,493,136
5. Step 5: Solve for x
   x = 648,087,157,493,136/11,915,471
6. Step 6: Final answer
   x = 54,390,393.59