Finding the Third Proportional to 13,201,616 and 21,005,288

Step by Step Solution

1. Step 1: Write the proportion equation
   13,201,616 : 21,005,288 = 21,005,288 : x
2. Step 2: Convert to fraction form
   13,201,616/21,005,288 = 21,005,288/x
3. Step 3: Cross multiply
   13,201,616x = 21,005,288 × 21,005,288
4. Step 4: Simplify right side
   13,201,616x = 441,222,123,962,944
5. Step 5: Solve for x
   x = 441,222,123,962,944/13,201,616
6. Step 6: Final answer
   x = 33,421,826.84