Finding the Third Proportional to 19,902,519 and 42,571,660

Step by Step Solution

1. Step 1: Write the proportion equation
   19,902,519 : 42,571,660 = 42,571,660 : x
2. Step 2: Convert to fraction form
   19,902,519/42,571,660 = 42,571,660/x
3. Step 3: Cross multiply
   19,902,519x = 42,571,660 × 42,571,660
4. Step 4: Simplify right side
   19,902,519x = 1,812,346,235,155,600
5. Step 5: Solve for x
   x = 1,812,346,235,155,600/19,902,519
6. Step 6: Final answer
   x = 91,061,148.35