Finding the Third Proportional to 221,868 and 485,208

Step by Step Solution

1. Step 1: Write the proportion equation
   221,868 : 485,208 = 485,208 : x
2. Step 2: Convert to fraction form
   221,868/485,208 = 485,208/x
3. Step 3: Cross multiply
   221,868x = 485,208 × 485,208
4. Step 4: Simplify right side
   221,868x = 235,426,803,264
5. Step 5: Solve for x
   x = 235,426,803,264/221,868
6. Step 6: Final answer
   x = 1,061,112.03