Finding the Third Proportional to 58,728.38 and 89,260.31

Step by Step Solution

1. Step 1: Write the proportion equation
   58,728.38 : 89,260.31 = 89,260.31 : x
2. Step 2: Convert to fraction form
   58,728.38/89,260.31 = 89,260.31/x
3. Step 3: Cross multiply
   58,728.38x = 89,260.31 × 89,260.31
4. Step 4: Simplify right side
   58,728.38x = 7,967,403,387.60
5. Step 5: Solve for x
   x = 7,967,403,387.60/58,728.38
6. Step 6: Final answer
   x = 135,665.31