Finding the Third Proportional to 99,807,666 and 218,400,300

Step by Step Solution

1. Step 1: Write the proportion equation
   99,807,666 : 218,400,300 = 218,400,300 : x
2. Step 2: Convert to fraction form
   99,807,666/218,400,300 = 218,400,300/x
3. Step 3: Cross multiply
   99,807,666x = 218,400,300 × 218,400,300
4. Step 4: Simplify right side
   99,807,666x = 47,698,691,040,090,000
5. Step 5: Solve for x
   x = 47,698,691,040,090,000/99,807,666
6. Step 6: Final answer
   x = 477,906,086.29