Finding the Third Proportional to 138,945.50 and 215,283

Step by Step Solution

1. Step 1: Write the proportion equation
   138,945.50 : 215,283 = 215,283 : x
2. Step 2: Convert to fraction form
   138,945.50/215,283 = 215,283/x
3. Step 3: Cross multiply
   138,945.50x = 215,283 × 215,283
4. Step 4: Simplify right side
   138,945.50x = 46,346,770,089
5. Step 5: Solve for x
   x = 46,346,770,089/138,945.50
6. Step 6: Final answer
   x = 333,560.79