Finding the Third Proportional to 89,307 and 121,621.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,307 : 121,621.50 = 121,621.50 : x
2. Step 2: Convert to fraction form
   89,307/121,621.50 = 121,621.50/x
3. Step 3: Cross multiply
   89,307x = 121,621.50 × 121,621.50
4. Step 4: Simplify right side
   89,307x = 14,791,789,262.25
5. Step 5: Solve for x
   x = 14,791,789,262.25/89,307
6. Step 6: Final answer
   x = 165,628.55