Finding the Fourth Proportional to 7,078.38, 9,768.42 and 3,934.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,078.38 : 9,768.42 = 3,934.50 : x
2. Step 2: Convert to fraction form
   7,078.38/9,768.42 = 3,934.50/x
3. Step 3: Cross multiply
   7,078.38x = 9,768.42 × 3,934.50
4. Step 4: Simplify right side
   7,078.38x = 38,433,848.49
5. Step 5: Solve for x
   x = 38,433,848.49/7,078.38
6. Step 6: Final answer
   x = 5,429.75