Finding the Third Proportional to 67,078.13 and 90,775.69

Step by Step Solution

1. Step 1: Write the proportion equation
   67,078.13 : 90,775.69 = 90,775.69 : x
2. Step 2: Convert to fraction form
   67,078.13/90,775.69 = 90,775.69/x
3. Step 3: Cross multiply
   67,078.13x = 90,775.69 × 90,775.69
4. Step 4: Simplify right side
   67,078.13x = 8,240,225,441.10
5. Step 5: Solve for x
   x = 8,240,225,441.10/67,078.13
6. Step 6: Final answer
   x = 122,845.20