Finding the Third Proportional to 220,686 and 472,476

Step by Step Solution

1. Step 1: Write the proportion equation
   220,686 : 472,476 = 472,476 : x
2. Step 2: Convert to fraction form
   220,686/472,476 = 472,476/x
3. Step 3: Cross multiply
   220,686x = 472,476 × 472,476
4. Step 4: Simplify right side
   220,686x = 223,233,570,576
5. Step 5: Solve for x
   x = 223,233,570,576/220,686
6. Step 6: Final answer
   x = 1,011,543.87