Finding the Third Proportional to 89,863.50 and 136,435.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,863.50 : 136,435.50 = 136,435.50 : x
2. Step 2: Convert to fraction form
   89,863.50/136,435.50 = 136,435.50/x
3. Step 3: Cross multiply
   89,863.50x = 136,435.50 × 136,435.50
4. Step 4: Simplify right side
   89,863.50x = 18,614,645,660.25
5. Step 5: Solve for x
   x = 18,614,645,660.25/89,863.50
6. Step 6: Final answer
   x = 207,143.56