Finding the Third Proportional to 57,728.25 and 86,762.25

Step by Step Solution

1. Step 1: Write the proportion equation
   57,728.25 : 86,762.25 = 86,762.25 : x
2. Step 2: Convert to fraction form
   57,728.25/86,762.25 = 86,762.25/x
3. Step 3: Cross multiply
   57,728.25x = 86,762.25 × 86,762.25
4. Step 4: Simplify right side
   57,728.25x = 7,527,688,025.06
5. Step 5: Solve for x
   x = 7,527,688,025.06/57,728.25
6. Step 6: Final answer
   x = 130,398.69