Finding the Third Proportional to 19,905,021,066 and 42,764,045,496

Step by Step Solution

1. Step 1: Write the proportion equation
   19,905,021,066 : 42,764,045,496 = 42,764,045,496 : x
2. Step 2: Convert to fraction form
   19,905,021,066/42,764,045,496 = 42,764,045,496/x
3. Step 3: Cross multiply
   19,905,021,066x = 42,764,045,496 × 42,764,045,496
4. Step 4: Simplify right side
   19,905,021,066x = 1,828,763,587,183,957,770,240
5. Step 5: Solve for x
   x = 1,828,763,587,183,957,770,240/19,905,021,066
6. Step 6: Final answer
   x = 91,874,486,398.19