Finding the Third Proportional to 220,472 and 478,526

Step by Step Solution

1. Step 1: Write the proportion equation
   220,472 : 478,526 = 478,526 : x
2. Step 2: Convert to fraction form
   220,472/478,526 = 478,526/x
3. Step 3: Cross multiply
   220,472x = 478,526 × 478,526
4. Step 4: Simplify right side
   220,472x = 228,987,132,676
5. Step 5: Solve for x
   x = 228,987,132,676/220,472
6. Step 6: Final answer
   x = 1,038,622.29