Finding the Third Proportional to 220,520 and 478,384

Step by Step Solution

1. Step 1: Write the proportion equation
   220,520 : 478,384 = 478,384 : x
2. Step 2: Convert to fraction form
   220,520/478,384 = 478,384/x
3. Step 3: Cross multiply
   220,520x = 478,384 × 478,384
4. Step 4: Simplify right side
   220,520x = 228,851,251,456
5. Step 5: Solve for x
   x = 228,851,251,456/220,520
6. Step 6: Final answer
   x = 1,037,780.03