Finding the Third Proportional to 67,990.50 and 149,440

Step by Step Solution

1. Step 1: Write the proportion equation
   67,990.50 : 149,440 = 149,440 : x
2. Step 2: Convert to fraction form
   67,990.50/149,440 = 149,440/x
3. Step 3: Cross multiply
   67,990.50x = 149,440 × 149,440
4. Step 4: Simplify right side
   67,990.50x = 22,332,313,600
5. Step 5: Solve for x
   x = 22,332,313,600/67,990.50
6. Step 6: Final answer
   x = 328,462.26