Finding the Third Proportional to 67,389.75 and 144,619.88

Step by Step Solution

1. Step 1: Write the proportion equation
   67,389.75 : 144,619.88 = 144,619.88 : x
2. Step 2: Convert to fraction form
   67,389.75/144,619.88 = 144,619.88/x
3. Step 3: Cross multiply
   67,389.75x = 144,619.88 × 144,619.88
4. Step 4: Simplify right side
   67,389.75x = 20,914,908,245.02
5. Step 5: Solve for x
   x = 20,914,908,245.02/67,389.75
6. Step 6: Final answer
   x = 310,357.41