Finding the Third Proportional to 67,078.69 and 90,776.53

Step by Step Solution

1. Step 1: Write the proportion equation
   67,078.69 : 90,776.53 = 90,776.53 : x
2. Step 2: Convert to fraction form
   67,078.69/90,776.53 = 90,776.53/x
3. Step 3: Cross multiply
   67,078.69x = 90,776.53 × 90,776.53
4. Step 4: Simplify right side
   67,078.69x = 8,240,378,625.78
5. Step 5: Solve for x
   x = 8,240,378,625.78/67,078.69
6. Step 6: Final answer
   x = 122,846.45