Finding the Third Proportional to 123,485,517.50 and 243,847,999

Step by Step Solution

1. Step 1: Write the proportion equation
   123,485,517.50 : 243,847,999 = 243,847,999 : x
2. Step 2: Convert to fraction form
   123,485,517.50/243,847,999 = 243,847,999/x
3. Step 3: Cross multiply
   123,485,517.50x = 243,847,999 × 243,847,999
4. Step 4: Simplify right side
   123,485,517.50x = 59,461,846,616,304,000
5. Step 5: Solve for x
   x = 59,461,846,616,304,000/123,485,517.50
6. Step 6: Final answer
   x = 481,528,909.79