Finding the Third Proportional to 67,660.31 and 144,706.50

Step by Step Solution

1. Step 1: Write the proportion equation
   67,660.31 : 144,706.50 = 144,706.50 : x
2. Step 2: Convert to fraction form
   67,660.31/144,706.50 = 144,706.50/x
3. Step 3: Cross multiply
   67,660.31x = 144,706.50 × 144,706.50
4. Step 4: Simplify right side
   67,660.31x = 20,939,971,142.25
5. Step 5: Solve for x
   x = 20,939,971,142.25/67,660.31
6. Step 6: Final answer
   x = 309,486.76