Finding the Third Proportional to 67,978.50 and 144,210

Step by Step Solution

1. Step 1: Write the proportion equation
   67,978.50 : 144,210 = 144,210 : x
2. Step 2: Convert to fraction form
   67,978.50/144,210 = 144,210/x
3. Step 3: Cross multiply
   67,978.50x = 144,210 × 144,210
4. Step 4: Simplify right side
   67,978.50x = 20,796,524,100
5. Step 5: Solve for x
   x = 20,796,524,100/67,978.50
6. Step 6: Final answer
   x = 305,927.96