Finding the Third Proportional to 41,689.69 and 66,847.78

Step by Step Solution

1. Step 1: Write the proportion equation
   41,689.69 : 66,847.78 = 66,847.78 : x
2. Step 2: Convert to fraction form
   41,689.69/66,847.78 = 66,847.78/x
3. Step 3: Cross multiply
   41,689.69x = 66,847.78 × 66,847.78
4. Step 4: Simplify right side
   41,689.69x = 4,468,625,858.05
5. Step 5: Solve for x
   x = 4,468,625,858.05/41,689.69
6. Step 6: Final answer
   x = 107,187.80