Finding the Third Proportional to 13,212,434 and 20,213,540

Step by Step Solution

1. Step 1: Write the proportion equation
   13,212,434 : 20,213,540 = 20,213,540 : x
2. Step 2: Convert to fraction form
   13,212,434/20,213,540 = 20,213,540/x
3. Step 3: Cross multiply
   13,212,434x = 20,213,540 × 20,213,540
4. Step 4: Simplify right side
   13,212,434x = 408,587,199,331,600
5. Step 5: Solve for x
   x = 408,587,199,331,600/13,212,434
6. Step 6: Final answer
   x = 30,924,445.82