Finding the Third Proportional to 145,600 and 318,142

Step by Step Solution

1. Step 1: Write the proportion equation
   145,600 : 318,142 = 318,142 : x
2. Step 2: Convert to fraction form
   145,600/318,142 = 318,142/x
3. Step 3: Cross multiply
   145,600x = 318,142 × 318,142
4. Step 4: Simplify right side
   145,600x = 101,214,332,164
5. Step 5: Solve for x
   x = 101,214,332,164/145,600
6. Step 6: Final answer
   x = 695,153.38