Finding the Third Proportional to 40,268.39 and 90,978.82

Step by Step Solution

1. Step 1: Write the proportion equation
   40,268.39 : 90,978.82 = 90,978.82 : x
2. Step 2: Convert to fraction form
   40,268.39/90,978.82 = 90,978.82/x
3. Step 3: Cross multiply
   40,268.39x = 90,978.82 × 90,978.82
4. Step 4: Simplify right side
   40,268.39x = 8,277,145,745.45
5. Step 5: Solve for x
   x = 8,277,145,745.45/40,268.39
6. Step 6: Final answer
   x = 205,549.45