Finding the Third Proportional to 57,749.06 and 86,388.75

Step by Step Solution

1. Step 1: Write the proportion equation
   57,749.06 : 86,388.75 = 86,388.75 : x
2. Step 2: Convert to fraction form
   57,749.06/86,388.75 = 86,388.75/x
3. Step 3: Cross multiply
   57,749.06x = 86,388.75 × 86,388.75
4. Step 4: Simplify right side
   57,749.06x = 7,463,016,126.56
5. Step 5: Solve for x
   x = 7,463,016,126.56/57,749.06
6. Step 6: Final answer
   x = 129,231.81