Finding the Third Proportional to 66,928 and 89,227.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,928 : 89,227.50 = 89,227.50 : x
2. Step 2: Convert to fraction form
   66,928/89,227.50 = 89,227.50/x
3. Step 3: Cross multiply
   66,928x = 89,227.50 × 89,227.50
4. Step 4: Simplify right side
   66,928x = 7,961,546,756.25
5. Step 5: Solve for x
   x = 7,961,546,756.25/66,928
6. Step 6: Final answer
   x = 118,956.89