Finding the Third Proportional to 67,615 and 144,609

Step by Step Solution

1. Step 1: Write the proportion equation
   67,615 : 144,609 = 144,609 : x
2. Step 2: Convert to fraction form
   67,615/144,609 = 144,609/x
3. Step 3: Cross multiply
   67,615x = 144,609 × 144,609
4. Step 4: Simplify right side
   67,615x = 20,911,762,881
5. Step 5: Solve for x
   x = 20,911,762,881/67,615
6. Step 6: Final answer
   x = 309,276.98