Finding the Third Proportional to 67,090 and 144,690.50

Step by Step Solution

1. Step 1: Write the proportion equation
   67,090 : 144,690.50 = 144,690.50 : x
2. Step 2: Convert to fraction form
   67,090/144,690.50 = 144,690.50/x
3. Step 3: Cross multiply
   67,090x = 144,690.50 × 144,690.50
4. Step 4: Simplify right side
   67,090x = 20,935,340,790.25
5. Step 5: Solve for x
   x = 20,935,340,790.25/67,090
6. Step 6: Final answer
   x = 312,048.60