Finding the Fourth Proportional to 5,185.29, 7,155.89 and 2,947.55

Step by Step Solution

1. Step 1: Write the proportion equation
   5,185.29 : 7,155.89 = 2,947.55 : x
2. Step 2: Convert to fraction form
   5,185.29/7,155.89 = 2,947.55/x
3. Step 3: Cross multiply
   5,185.29x = 7,155.89 × 2,947.55
4. Step 4: Simplify right side
   5,185.29x = 21,092,293.05
5. Step 5: Solve for x
   x = 21,092,293.05/5,185.29
6. Step 6: Final answer
   x = 4,067.72