Finding the Third Proportional to 8,458,575 and 12,690,456

Step by Step Solution

1. Step 1: Write the proportion equation
   8,458,575 : 12,690,456 = 12,690,456 : x
2. Step 2: Convert to fraction form
   8,458,575/12,690,456 = 12,690,456/x
3. Step 3: Cross multiply
   8,458,575x = 12,690,456 × 12,690,456
4. Step 4: Simplify right side
   8,458,575x = 161,047,673,487,936
5. Step 5: Solve for x
   x = 161,047,673,487,936/8,458,575
6. Step 6: Final answer
   x = 19,039,575.05