Finding the Third Proportional to 442,785 and 664,258.50

Step by Step Solution

1. Step 1: Write the proportion equation
   442,785 : 664,258.50 = 664,258.50 : x
2. Step 2: Convert to fraction form
   442,785/664,258.50 = 664,258.50/x
3. Step 3: Cross multiply
   442,785x = 664,258.50 × 664,258.50
4. Step 4: Simplify right side
   442,785x = 441,239,354,822.25
5. Step 5: Solve for x
   x = 441,239,354,822.25/442,785
6. Step 6: Final answer
   x = 996,509.26