Finding the Third Proportional to 221,566 and 487,436

Step by Step Solution

1. Step 1: Write the proportion equation
   221,566 : 487,436 = 487,436 : x
2. Step 2: Convert to fraction form
   221,566/487,436 = 487,436/x
3. Step 3: Cross multiply
   221,566x = 487,436 × 487,436
4. Step 4: Simplify right side
   221,566x = 237,593,854,096
5. Step 5: Solve for x
   x = 237,593,854,096/221,566
6. Step 6: Final answer
   x = 1,072,338.96