Finding the Third Proportional to 89,217.75 and 121,109.25

Step by Step Solution

1. Step 1: Write the proportion equation
   89,217.75 : 121,109.25 = 121,109.25 : x
2. Step 2: Convert to fraction form
   89,217.75/121,109.25 = 121,109.25/x
3. Step 3: Cross multiply
   89,217.75x = 121,109.25 × 121,109.25
4. Step 4: Simplify right side
   89,217.75x = 14,667,450,435.56
5. Step 5: Solve for x
   x = 14,667,450,435.56/89,217.75
6. Step 6: Final answer
   x = 164,400.59