Finding the Third Proportional to 13,199,772 and 21,003,642

Step by Step Solution

1. Step 1: Write the proportion equation
   13,199,772 : 21,003,642 = 21,003,642 : x
2. Step 2: Convert to fraction form
   13,199,772/21,003,642 = 21,003,642/x
3. Step 3: Cross multiply
   13,199,772x = 21,003,642 × 21,003,642
4. Step 4: Simplify right side
   13,199,772x = 441,152,977,264,164
5. Step 5: Solve for x
   x = 441,152,977,264,164/13,199,772
6. Step 6: Final answer
   x = 33,421,257.37