Finding the Third Proportional to 89,559 and 139,785.75

Step by Step Solution

1. Step 1: Write the proportion equation
   89,559 : 139,785.75 = 139,785.75 : x
2. Step 2: Convert to fraction form
   89,559/139,785.75 = 139,785.75/x
3. Step 3: Cross multiply
   89,559x = 139,785.75 × 139,785.75
4. Step 4: Simplify right side
   89,559x = 19,540,055,903.06
5. Step 5: Solve for x
   x = 19,540,055,903.06/89,559
6. Step 6: Final answer
   x = 218,180.82