Finding the Third Proportional to 218,372 and 477,478

Step by Step Solution

1. Step 1: Write the proportion equation
   218,372 : 477,478 = 477,478 : x
2. Step 2: Convert to fraction form
   218,372/477,478 = 477,478/x
3. Step 3: Cross multiply
   218,372x = 477,478 × 477,478
4. Step 4: Simplify right side
   218,372x = 227,985,240,484
5. Step 5: Solve for x
   x = 227,985,240,484/218,372
6. Step 6: Final answer
   x = 1,044,022.31