Finding the Third Proportional to 89,219.50 and 121,111.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,219.50 : 121,111.50 = 121,111.50 : x
2. Step 2: Convert to fraction form
   89,219.50/121,111.50 = 121,111.50/x
3. Step 3: Cross multiply
   89,219.50x = 121,111.50 × 121,111.50
4. Step 4: Simplify right side
   89,219.50x = 14,667,995,432.25
5. Step 5: Solve for x
   x = 14,667,995,432.25/89,219.50
6. Step 6: Final answer
   x = 164,403.47