Finding the Third Proportional to 67,320 and 141,740

Step by Step Solution

1. Step 1: Write the proportion equation
   67,320 : 141,740 = 141,740 : x
2. Step 2: Convert to fraction form
   67,320/141,740 = 141,740/x
3. Step 3: Cross multiply
   67,320x = 141,740 × 141,740
4. Step 4: Simplify right side
   67,320x = 20,090,227,600
5. Step 5: Solve for x
   x = 20,090,227,600/67,320
6. Step 6: Final answer
   x = 298,428.81