Finding the Third Proportional to 218,338 and 477,410

Step by Step Solution

1. Step 1: Write the proportion equation
   218,338 : 477,410 = 477,410 : x
2. Step 2: Convert to fraction form
   218,338/477,410 = 477,410/x
3. Step 3: Cross multiply
   218,338x = 477,410 × 477,410
4. Step 4: Simplify right side
   218,338x = 227,920,308,100
5. Step 5: Solve for x
   x = 227,920,308,100/218,338
6. Step 6: Final answer
   x = 1,043,887.50