Finding the Third Proportional to 221,578 and 480,740

Step by Step Solution

1. Step 1: Write the proportion equation
   221,578 : 480,740 = 480,740 : x
2. Step 2: Convert to fraction form
   221,578/480,740 = 480,740/x
3. Step 3: Cross multiply
   221,578x = 480,740 × 480,740
4. Step 4: Simplify right side
   221,578x = 231,110,947,600
5. Step 5: Solve for x
   x = 231,110,947,600/221,578
6. Step 6: Final answer
   x = 1,043,022.99