Finding the Third Proportional to 13,201,789 and 21,006,642

Step by Step Solution

1. Step 1: Write the proportion equation
   13,201,789 : 21,006,642 = 21,006,642 : x
2. Step 2: Convert to fraction form
   13,201,789/21,006,642 = 21,006,642/x
3. Step 3: Cross multiply
   13,201,789x = 21,006,642 × 21,006,642
4. Step 4: Simplify right side
   13,201,789x = 441,279,008,116,164
5. Step 5: Solve for x
   x = 441,279,008,116,164/13,201,789
6. Step 6: Final answer
   x = 33,425,697.69