Finding the Third Proportional to 98,688.38 and 145,845.56

Step by Step Solution

1. Step 1: Write the proportion equation
   98,688.38 : 145,845.56 = 145,845.56 : x
2. Step 2: Convert to fraction form
   98,688.38/145,845.56 = 145,845.56/x
3. Step 3: Cross multiply
   98,688.38x = 145,845.56 × 145,845.56
4. Step 4: Simplify right side
   98,688.38x = 21,270,928,100.94
5. Step 5: Solve for x
   x = 21,270,928,100.94/98,688.38
6. Step 6: Final answer
   x = 215,536.31