Finding the Third Proportional to 356,240 and 476,760

Step by Step Solution

1. Step 1: Write the proportion equation
   356,240 : 476,760 = 476,760 : x
2. Step 2: Convert to fraction form
   356,240/476,760 = 476,760/x
3. Step 3: Cross multiply
   356,240x = 476,760 × 476,760
4. Step 4: Simplify right side
   356,240x = 227,300,097,600
5. Step 5: Solve for x
   x = 227,300,097,600/356,240
6. Step 6: Final answer
   x = 638,053.27