Finding the Third Proportional to 142,060 and 289,017

Step by Step Solution

1. Step 1: Write the proportion equation
   142,060 : 289,017 = 289,017 : x
2. Step 2: Convert to fraction form
   142,060/289,017 = 289,017/x
3. Step 3: Cross multiply
   142,060x = 289,017 × 289,017
4. Step 4: Simplify right side
   142,060x = 83,530,826,289
5. Step 5: Solve for x
   x = 83,530,826,289/142,060
6. Step 6: Final answer
   x = 587,996.81