Finding the Third Proportional to 66,757.50 and 89,174.25

Step by Step Solution

1. Step 1: Write the proportion equation
   66,757.50 : 89,174.25 = 89,174.25 : x
2. Step 2: Convert to fraction form
   66,757.50/89,174.25 = 89,174.25/x
3. Step 3: Cross multiply
   66,757.50x = 89,174.25 × 89,174.25
4. Step 4: Simplify right side
   66,757.50x = 7,952,046,863.06
5. Step 5: Solve for x
   x = 7,952,046,863.06/66,757.50
6. Step 6: Final answer
   x = 119,118.40