Finding the Third Proportional to 285,940 and 611,144

Step by Step Solution

1. Step 1: Write the proportion equation
   285,940 : 611,144 = 611,144 : x
2. Step 2: Convert to fraction form
   285,940/611,144 = 611,144/x
3. Step 3: Cross multiply
   285,940x = 611,144 × 611,144
4. Step 4: Simplify right side
   285,940x = 373,496,988,736
5. Step 5: Solve for x
   x = 373,496,988,736/285,940
6. Step 6: Final answer
   x = 1,306,207.56