Finding the Third Proportional to 313,870 and 403,004

Step by Step Solution

1. Step 1: Write the proportion equation
   313,870 : 403,004 = 403,004 : x
2. Step 2: Convert to fraction form
   313,870/403,004 = 403,004/x
3. Step 3: Cross multiply
   313,870x = 403,004 × 403,004
4. Step 4: Simplify right side
   313,870x = 162,412,224,016
5. Step 5: Solve for x
   x = 162,412,224,016/313,870
6. Step 6: Final answer
   x = 517,450.61