Finding the Fourth Proportional to 3,934.76, 5,394.78 and 3,864.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,934.76 : 5,394.78 = 3,864.56 : x
2. Step 2: Convert to fraction form
   3,934.76/5,394.78 = 3,864.56/x
3. Step 3: Cross multiply
   3,934.76x = 5,394.78 × 3,864.56
4. Step 4: Simplify right side
   3,934.76x = 20,848,451.00
5. Step 5: Solve for x
   x = 20,848,451.00/3,934.76
6. Step 6: Final answer
   x = 5,298.53