Finding the Third Proportional to 638,661 and 888,007.50

Step by Step Solution

1. Step 1: Write the proportion equation
   638,661 : 888,007.50 = 888,007.50 : x
2. Step 2: Convert to fraction form
   638,661/888,007.50 = 888,007.50/x
3. Step 3: Cross multiply
   638,661x = 888,007.50 × 888,007.50
4. Step 4: Simplify right side
   638,661x = 788,557,320,056.25
5. Step 5: Solve for x
   x = 788,557,320,056.25/638,661
6. Step 6: Final answer
   x = 1,234,704.04