Finding the Third Proportional to 221,760 and 487,764

Step by Step Solution

1. Step 1: Write the proportion equation
   221,760 : 487,764 = 487,764 : x
2. Step 2: Convert to fraction form
   221,760/487,764 = 487,764/x
3. Step 3: Cross multiply
   221,760x = 487,764 × 487,764
4. Step 4: Simplify right side
   221,760x = 237,913,719,696
5. Step 5: Solve for x
   x = 237,913,719,696/221,760
6. Step 6: Final answer
   x = 1,072,843.25