Finding the Third Proportional to 89,989.50 and 137,711.25

Step by Step Solution

1. Step 1: Write the proportion equation
   89,989.50 : 137,711.25 = 137,711.25 : x
2. Step 2: Convert to fraction form
   89,989.50/137,711.25 = 137,711.25/x
3. Step 3: Cross multiply
   89,989.50x = 137,711.25 × 137,711.25
4. Step 4: Simplify right side
   89,989.50x = 18,964,388,376.56
5. Step 5: Solve for x
   x = 18,964,388,376.56/89,989.50
6. Step 6: Final answer
   x = 210,740.01