Finding the Third Proportional to 58,122 and 89,811

Step by Step Solution

1. Step 1: Write the proportion equation
   58,122 : 89,811 = 89,811 : x
2. Step 2: Convert to fraction form
   58,122/89,811 = 89,811/x
3. Step 3: Cross multiply
   58,122x = 89,811 × 89,811
4. Step 4: Simplify right side
   58,122x = 8,066,015,721
5. Step 5: Solve for x
   x = 8,066,015,721/58,122
6. Step 6: Final answer
   x = 138,777.33