Finding the Third Proportional to 638,697 and 888,047.50

Step by Step Solution

1. Step 1: Write the proportion equation
   638,697 : 888,047.50 = 888,047.50 : x
2. Step 2: Convert to fraction form
   638,697/888,047.50 = 888,047.50/x
3. Step 3: Cross multiply
   638,697x = 888,047.50 × 888,047.50
4. Step 4: Simplify right side
   638,697x = 788,628,362,256.25
5. Step 5: Solve for x
   x = 788,628,362,256.25/638,697
6. Step 6: Final answer
   x = 1,234,745.68