Finding the Third Proportional to 58,980 and 89,406

Step by Step Solution

1. Step 1: Write the proportion equation
   58,980 : 89,406 = 89,406 : x
2. Step 2: Convert to fraction form
   58,980/89,406 = 89,406/x
3. Step 3: Cross multiply
   58,980x = 89,406 × 89,406
4. Step 4: Simplify right side
   58,980x = 7,993,432,836
5. Step 5: Solve for x
   x = 7,993,432,836/58,980
6. Step 6: Final answer
   x = 135,527.85