Finding the Third Proportional to 68,960 and 143,040

Step by Step Solution

1. Step 1: Write the proportion equation
   68,960 : 143,040 = 143,040 : x
2. Step 2: Convert to fraction form
   68,960/143,040 = 143,040/x
3. Step 3: Cross multiply
   68,960x = 143,040 × 143,040
4. Step 4: Simplify right side
   68,960x = 20,460,441,600
5. Step 5: Solve for x
   x = 20,460,441,600/68,960
6. Step 6: Final answer
   x = 296,700.14