Finding the Third Proportional to 88,609.50 and 137,369.25

Step by Step Solution

1. Step 1: Write the proportion equation
   88,609.50 : 137,369.25 = 137,369.25 : x
2. Step 2: Convert to fraction form
   88,609.50/137,369.25 = 137,369.25/x
3. Step 3: Cross multiply
   88,609.50x = 137,369.25 × 137,369.25
4. Step 4: Simplify right side
   88,609.50x = 18,870,310,845.56
5. Step 5: Solve for x
   x = 18,870,310,845.56/88,609.50
6. Step 6: Final answer
   x = 212,960.36