Finding the Third Proportional to 8,242,422 and 12,608,402

Step by Step Solution

1. Step 1: Write the proportion equation
   8,242,422 : 12,608,402 = 12,608,402 : x
2. Step 2: Convert to fraction form
   8,242,422/12,608,402 = 12,608,402/x
3. Step 3: Cross multiply
   8,242,422x = 12,608,402 × 12,608,402
4. Step 4: Simplify right side
   8,242,422x = 158,971,800,993,604
5. Step 5: Solve for x
   x = 158,971,800,993,604/8,242,422
6. Step 6: Final answer
   x = 19,287,025.22