Finding the Third Proportional to 221,764 and 487,772

Step by Step Solution

1. Step 1: Write the proportion equation
   221,764 : 487,772 = 487,772 : x
2. Step 2: Convert to fraction form
   221,764/487,772 = 487,772/x
3. Step 3: Cross multiply
   221,764x = 487,772 × 487,772
4. Step 4: Simplify right side
   221,764x = 237,921,523,984
5. Step 5: Solve for x
   x = 237,921,523,984/221,764
6. Step 6: Final answer
   x = 1,072,859.09