Finding the Third Proportional to 638,659 and 888,004.50

Step by Step Solution

1. Step 1: Write the proportion equation
   638,659 : 888,004.50 = 888,004.50 : x
2. Step 2: Convert to fraction form
   638,659/888,004.50 = 888,004.50/x
3. Step 3: Cross multiply
   638,659x = 888,004.50 × 888,004.50
4. Step 4: Simplify right side
   638,659x = 788,551,992,020.25
5. Step 5: Solve for x
   x = 788,551,992,020.25/638,659
6. Step 6: Final answer
   x = 1,234,699.57