Finding the Third Proportional to 57,906.56 and 86,999.06

Step by Step Solution

1. Step 1: Write the proportion equation
   57,906.56 : 86,999.06 = 86,999.06 : x
2. Step 2: Convert to fraction form
   57,906.56/86,999.06 = 86,999.06/x
3. Step 3: Cross multiply
   57,906.56x = 86,999.06 × 86,999.06
4. Step 4: Simplify right side
   57,906.56x = 7,568,836,875.88
5. Step 5: Solve for x
   x = 7,568,836,875.88/57,906.56
6. Step 6: Final answer
   x = 130,707.76