Finding the Fourth Proportional to 8,077.20, 12,105.58 and 3,394.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,077.20 : 12,105.58 = 3,394.78 : x
2. Step 2: Convert to fraction form
   8,077.20/12,105.58 = 3,394.78/x
3. Step 3: Cross multiply
   8,077.20x = 12,105.58 × 3,394.78
4. Step 4: Simplify right side
   8,077.20x = 41,095,780.87
5. Step 5: Solve for x
   x = 41,095,780.87/8,077.20
6. Step 6: Final answer
   x = 5,087.87