Finding the Third Proportional to 359,489 and 550,142

Step by Step Solution

1. Step 1: Write the proportion equation
   359,489 : 550,142 = 550,142 : x
2. Step 2: Convert to fraction form
   359,489/550,142 = 550,142/x
3. Step 3: Cross multiply
   359,489x = 550,142 × 550,142
4. Step 4: Simplify right side
   359,489x = 302,656,220,164
5. Step 5: Solve for x
   x = 302,656,220,164/359,489
6. Step 6: Final answer
   x = 841,906.76