Finding the Fourth Proportional to 5,146.71, 7,723.85 and 3,979.59

Step by Step Solution

1. Step 1: Write the proportion equation
   5,146.71 : 7,723.85 = 3,979.59 : x
2. Step 2: Convert to fraction form
   5,146.71/7,723.85 = 3,979.59/x
3. Step 3: Cross multiply
   5,146.71x = 7,723.85 × 3,979.59
4. Step 4: Simplify right side
   5,146.71x = 30,737,736.32
5. Step 5: Solve for x
   x = 30,737,736.32/5,146.71
6. Step 6: Final answer
   x = 5,972.31