Finding the Third Proportional to 407,820 and 622,098

Step by Step Solution

1. Step 1: Write the proportion equation
   407,820 : 622,098 = 622,098 : x
2. Step 2: Convert to fraction form
   407,820/622,098 = 622,098/x
3. Step 3: Cross multiply
   407,820x = 622,098 × 622,098
4. Step 4: Simplify right side
   407,820x = 387,005,921,604
5. Step 5: Solve for x
   x = 387,005,921,604/407,820
6. Step 6: Final answer
   x = 948,962.59