Finding the Third Proportional to 142,904 and 310,404

Step by Step Solution

1. Step 1: Write the proportion equation
   142,904 : 310,404 = 310,404 : x
2. Step 2: Convert to fraction form
   142,904/310,404 = 310,404/x
3. Step 3: Cross multiply
   142,904x = 310,404 × 310,404
4. Step 4: Simplify right side
   142,904x = 96,350,643,216
5. Step 5: Solve for x
   x = 96,350,643,216/142,904
6. Step 6: Final answer
   x = 674,233.35