Finding the Third Proportional to 221,544 and 534,124.50

Step by Step Solution

1. Step 1: Write the proportion equation
   221,544 : 534,124.50 = 534,124.50 : x
2. Step 2: Convert to fraction form
   221,544/534,124.50 = 534,124.50/x
3. Step 3: Cross multiply
   221,544x = 534,124.50 × 534,124.50
4. Step 4: Simplify right side
   221,544x = 285,288,981,500.25
5. Step 5: Solve for x
   x = 285,288,981,500.25/221,544
6. Step 6: Final answer
   x = 1,287,730.57