Finding the Third Proportional to 19,902,399.75 and 42,571,408.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,902,399.75 : 42,571,408.50 = 42,571,408.50 : x
2. Step 2: Convert to fraction form
   19,902,399.75/42,571,408.50 = 42,571,408.50/x
3. Step 3: Cross multiply
   19,902,399.75x = 42,571,408.50 × 42,571,408.50
4. Step 4: Simplify right side
   19,902,399.75x = 1,812,324,821,673,872.25
5. Step 5: Solve for x
   x = 1,812,324,821,673,872.25/19,902,399.75
6. Step 6: Final answer
   x = 91,060,618.04