Finding the Third Proportional to 89,212 and 121,100

Step by Step Solution

1. Step 1: Write the proportion equation
   89,212 : 121,100 = 121,100 : x
2. Step 2: Convert to fraction form
   89,212/121,100 = 121,100/x
3. Step 3: Cross multiply
   89,212x = 121,100 × 121,100
4. Step 4: Simplify right side
   89,212x = 14,665,210,000
5. Step 5: Solve for x
   x = 14,665,210,000/89,212
6. Step 6: Final answer
   x = 164,386.07