Finding the Third Proportional to 221,536 and 485,960

Step by Step Solution

1. Step 1: Write the proportion equation
   221,536 : 485,960 = 485,960 : x
2. Step 2: Convert to fraction form
   221,536/485,960 = 485,960/x
3. Step 3: Cross multiply
   221,536x = 485,960 × 485,960
4. Step 4: Simplify right side
   221,536x = 236,157,121,600
5. Step 5: Solve for x
   x = 236,157,121,600/221,536
6. Step 6: Final answer
   x = 1,065,998.85