Finding the Third Proportional to 13,199,776 and 21,003,648

Step by Step Solution

1. Step 1: Write the proportion equation
   13,199,776 : 21,003,648 = 21,003,648 : x
2. Step 2: Convert to fraction form
   13,199,776/21,003,648 = 21,003,648/x
3. Step 3: Cross multiply
   13,199,776x = 21,003,648 × 21,003,648
4. Step 4: Simplify right side
   13,199,776x = 441,153,229,307,904
5. Step 5: Solve for x
   x = 441,153,229,307,904/13,199,776
6. Step 6: Final answer
   x = 33,421,266.34