Finding the Third Proportional to 68,940 and 142,308

Step by Step Solution

1. Step 1: Write the proportion equation
   68,940 : 142,308 = 142,308 : x
2. Step 2: Convert to fraction form
   68,940/142,308 = 142,308/x
3. Step 3: Cross multiply
   68,940x = 142,308 × 142,308
4. Step 4: Simplify right side
   68,940x = 20,251,566,864
5. Step 5: Solve for x
   x = 20,251,566,864/68,940
6. Step 6: Final answer
   x = 293,756.41