Finding the Third Proportional to 98,688.38 and 142,443.56

Step by Step Solution

1. Step 1: Write the proportion equation
   98,688.38 : 142,443.56 = 142,443.56 : x
2. Step 2: Convert to fraction form
   98,688.38/142,443.56 = 142,443.56/x
3. Step 3: Cross multiply
   98,688.38x = 142,443.56 × 142,443.56
4. Step 4: Simplify right side
   98,688.38x = 20,290,168,497.69
5. Step 5: Solve for x
   x = 20,290,168,497.69/98,688.38
6. Step 6: Final answer
   x = 205,598.36