Finding the Third Proportional to 89,744.63 and 138,945.38

Step by Step Solution

1. Step 1: Write the proportion equation
   89,744.63 : 138,945.38 = 138,945.38 : x
2. Step 2: Convert to fraction form
   89,744.63/138,945.38 = 138,945.38/x
3. Step 3: Cross multiply
   89,744.63x = 138,945.38 × 138,945.38
4. Step 4: Simplify right side
   89,744.63x = 19,305,817,233.89
5. Step 5: Solve for x
   x = 19,305,817,233.89/89,744.63
6. Step 6: Final answer
   x = 215,119.48