Finding the Third Proportional to 89,439 and 121,036.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,439 : 121,036.50 = 121,036.50 : x
2. Step 2: Convert to fraction form
   89,439/121,036.50 = 121,036.50/x
3. Step 3: Cross multiply
   89,439x = 121,036.50 × 121,036.50
4. Step 4: Simplify right side
   89,439x = 14,649,834,332.25
5. Step 5: Solve for x
   x = 14,649,834,332.25/89,439
6. Step 6: Final answer
   x = 163,796.94