Finding the Third Proportional to 145,494 and 318,042

Step by Step Solution

1. Step 1: Write the proportion equation
   145,494 : 318,042 = 318,042 : x
2. Step 2: Convert to fraction form
   145,494/318,042 = 318,042/x
3. Step 3: Cross multiply
   145,494x = 318,042 × 318,042
4. Step 4: Simplify right side
   145,494x = 101,150,713,764
5. Step 5: Solve for x
   x = 101,150,713,764/145,494
6. Step 6: Final answer
   x = 695,222.58