Finding the Third Proportional to 422,293.50 and 622,242

Step by Step Solution

1. Step 1: Write the proportion equation
   422,293.50 : 622,242 = 622,242 : x
2. Step 2: Convert to fraction form
   422,293.50/622,242 = 622,242/x
3. Step 3: Cross multiply
   422,293.50x = 622,242 × 622,242
4. Step 4: Simplify right side
   422,293.50x = 387,185,106,564
5. Step 5: Solve for x
   x = 387,185,106,564/422,293.50
6. Step 6: Final answer
   x = 916,862.58