Finding the Third Proportional to 422,901 and 647,746.88

Step by Step Solution

1. Step 1: Write the proportion equation
   422,901 : 647,746.88 = 647,746.88 : x
2. Step 2: Convert to fraction form
   422,901/647,746.88 = 647,746.88/x
3. Step 3: Cross multiply
   422,901x = 647,746.88 × 647,746.88
4. Step 4: Simplify right side
   422,901x = 419,576,014,072.27
5. Step 5: Solve for x
   x = 419,576,014,072.27/422,901
6. Step 6: Final answer
   x = 992,137.67