Finding the Third Proportional to 144,280.50 and 215,613

Step by Step Solution

1. Step 1: Write the proportion equation
   144,280.50 : 215,613 = 215,613 : x
2. Step 2: Convert to fraction form
   144,280.50/215,613 = 215,613/x
3. Step 3: Cross multiply
   144,280.50x = 215,613 × 215,613
4. Step 4: Simplify right side
   144,280.50x = 46,488,965,769
5. Step 5: Solve for x
   x = 46,488,965,769/144,280.50
6. Step 6: Final answer
   x = 322,212.40