Finding the Third Proportional to 19,902,511 and 42,571,644

Step by Step Solution

1. Step 1: Write the proportion equation
   19,902,511 : 42,571,644 = 42,571,644 : x
2. Step 2: Convert to fraction form
   19,902,511/42,571,644 = 42,571,644/x
3. Step 3: Cross multiply
   19,902,511x = 42,571,644 × 42,571,644
4. Step 4: Simplify right side
   19,902,511x = 1,812,344,872,862,736
5. Step 5: Solve for x
   x = 1,812,344,872,862,736/19,902,511
6. Step 6: Final answer
   x = 91,061,116.50