Finding the Third Proportional to 61,231.50 and 89,749.50

Step by Step Solution

1. Step 1: Write the proportion equation
   61,231.50 : 89,749.50 = 89,749.50 : x
2. Step 2: Convert to fraction form
   61,231.50/89,749.50 = 89,749.50/x
3. Step 3: Cross multiply
   61,231.50x = 89,749.50 × 89,749.50
4. Step 4: Simplify right side
   61,231.50x = 8,054,972,750.25
5. Step 5: Solve for x
   x = 8,054,972,750.25/61,231.50
6. Step 6: Final answer
   x = 131,549.49