Finding the Third Proportional to 13,199,796 and 21,003,678

Step by Step Solution

1. Step 1: Write the proportion equation
   13,199,796 : 21,003,678 = 21,003,678 : x
2. Step 2: Convert to fraction form
   13,199,796/21,003,678 = 21,003,678/x
3. Step 3: Cross multiply
   13,199,796x = 21,003,678 × 21,003,678
4. Step 4: Simplify right side
   13,199,796x = 441,154,489,527,684
5. Step 5: Solve for x
   x = 441,154,489,527,684/13,199,796
6. Step 6: Final answer
   x = 33,421,311.17