Finding the Third Proportional to 140,403 and 290,742

Step by Step Solution

1. Step 1: Write the proportion equation
   140,403 : 290,742 = 290,742 : x
2. Step 2: Convert to fraction form
   140,403/290,742 = 290,742/x
3. Step 3: Cross multiply
   140,403x = 290,742 × 290,742
4. Step 4: Simplify right side
   140,403x = 84,530,910,564
5. Step 5: Solve for x
   x = 84,530,910,564/140,403
6. Step 6: Final answer
   x = 602,059.15