Finding the Third Proportional to 690,843,304.50 and 987,914,054.25

Step by Step Solution

1. Step 1: Write the proportion equation
   690,843,304.50 : 987,914,054.25 = 987,914,054.25 : x
2. Step 2: Convert to fraction form
   690,843,304.50/987,914,054.25 = 987,914,054.25/x
3. Step 3: Cross multiply
   690,843,304.50x = 987,914,054.25 × 987,914,054.25
4. Step 4: Simplify right side
   690,843,304.50x = 975,974,178,584,672,000
5. Step 5: Solve for x
   x = 975,974,178,584,672,000/690,843,304.50
6. Step 6: Final answer
   x = 1,412,728,721.88