Finding the Third Proportional to 220,828 and 478,998

Step by Step Solution

1. Step 1: Write the proportion equation
   220,828 : 478,998 = 478,998 : x
2. Step 2: Convert to fraction form
   220,828/478,998 = 478,998/x
3. Step 3: Cross multiply
   220,828x = 478,998 × 478,998
4. Step 4: Simplify right side
   220,828x = 229,439,084,004
5. Step 5: Solve for x
   x = 229,439,084,004/220,828
6. Step 6: Final answer
   x = 1,038,994.53