Finding the Third Proportional to 67,405.50 and 145,179

Step by Step Solution

1. Step 1: Write the proportion equation
   67,405.50 : 145,179 = 145,179 : x
2. Step 2: Convert to fraction form
   67,405.50/145,179 = 145,179/x
3. Step 3: Cross multiply
   67,405.50x = 145,179 × 145,179
4. Step 4: Simplify right side
   67,405.50x = 21,076,942,041
5. Step 5: Solve for x
   x = 21,076,942,041/67,405.50
6. Step 6: Final answer
   x = 312,688.76