Finding the Third Proportional to 221,570 and 487,444

Step by Step Solution

1. Step 1: Write the proportion equation
   221,570 : 487,444 = 487,444 : x
2. Step 2: Convert to fraction form
   221,570/487,444 = 487,444/x
3. Step 3: Cross multiply
   221,570x = 487,444 × 487,444
4. Step 4: Simplify right side
   221,570x = 237,601,653,136
5. Step 5: Solve for x
   x = 237,601,653,136/221,570
6. Step 6: Final answer
   x = 1,072,354.80