Finding the Third Proportional to 58,709 and 89,187

Step by Step Solution

1. Step 1: Write the proportion equation
   58,709 : 89,187 = 89,187 : x
2. Step 2: Convert to fraction form
   58,709/89,187 = 89,187/x
3. Step 3: Cross multiply
   58,709x = 89,187 × 89,187
4. Step 4: Simplify right side
   58,709x = 7,954,320,969
5. Step 5: Solve for x
   x = 7,954,320,969/58,709
6. Step 6: Final answer
   x = 135,487.25