Finding the Third Proportional to 221,688 and 474,876

Step by Step Solution

1. Step 1: Write the proportion equation
   221,688 : 474,876 = 474,876 : x
2. Step 2: Convert to fraction form
   221,688/474,876 = 474,876/x
3. Step 3: Cross multiply
   221,688x = 474,876 × 474,876
4. Step 4: Simplify right side
   221,688x = 225,507,215,376
5. Step 5: Solve for x
   x = 225,507,215,376/221,688
6. Step 6: Final answer
   x = 1,017,227.89