Finding the Third Proportional to 68,189.50 and 91,725.50

Step by Step Solution

1. Step 1: Write the proportion equation
   68,189.50 : 91,725.50 = 91,725.50 : x
2. Step 2: Convert to fraction form
   68,189.50/91,725.50 = 91,725.50/x
3. Step 3: Cross multiply
   68,189.50x = 91,725.50 × 91,725.50
4. Step 4: Simplify right side
   68,189.50x = 8,413,567,350.25
5. Step 5: Solve for x
   x = 8,413,567,350.25/68,189.50
6. Step 6: Final answer
   x = 123,385.09