Finding the Third Proportional to 68,121 and 144,355.50

Step by Step Solution

1. Step 1: Write the proportion equation
   68,121 : 144,355.50 = 144,355.50 : x
2. Step 2: Convert to fraction form
   68,121/144,355.50 = 144,355.50/x
3. Step 3: Cross multiply
   68,121x = 144,355.50 × 144,355.50
4. Step 4: Simplify right side
   68,121x = 20,838,510,380.25
5. Step 5: Solve for x
   x = 20,838,510,380.25/68,121
6. Step 6: Final answer
   x = 305,904.35