Finding the Third Proportional to 67,138 and 144,580

Step by Step Solution

1. Step 1: Write the proportion equation
   67,138 : 144,580 = 144,580 : x
2. Step 2: Convert to fraction form
   67,138/144,580 = 144,580/x
3. Step 3: Cross multiply
   67,138x = 144,580 × 144,580
4. Step 4: Simplify right side
   67,138x = 20,903,376,400
5. Step 5: Solve for x
   x = 20,903,376,400/67,138
6. Step 6: Final answer
   x = 311,349.41