Finding the Third Proportional to 220,410 and 480,780

Step by Step Solution

1. Step 1: Write the proportion equation
   220,410 : 480,780 = 480,780 : x
2. Step 2: Convert to fraction form
   220,410/480,780 = 480,780/x
3. Step 3: Cross multiply
   220,410x = 480,780 × 480,780
4. Step 4: Simplify right side
   220,410x = 231,149,408,400
5. Step 5: Solve for x
   x = 231,149,408,400/220,410
6. Step 6: Final answer
   x = 1,048,724.69