Finding the Third Proportional to 641,640 and 897,025.50

Step by Step Solution

1. Step 1: Write the proportion equation
   641,640 : 897,025.50 = 897,025.50 : x
2. Step 2: Convert to fraction form
   641,640/897,025.50 = 897,025.50/x
3. Step 3: Cross multiply
   641,640x = 897,025.50 × 897,025.50
4. Step 4: Simplify right side
   641,640x = 804,654,747,650.25
5. Step 5: Solve for x
   x = 804,654,747,650.25/641,640
6. Step 6: Final answer
   x = 1,254,059.52