Finding the Fourth Proportional to 5,185.30, 7,155.82 and 2,947.26

Step by Step Solution

1. Step 1: Write the proportion equation
   5,185.30 : 7,155.82 = 2,947.26 : x
2. Step 2: Convert to fraction form
   5,185.30/7,155.82 = 2,947.26/x
3. Step 3: Cross multiply
   5,185.30x = 7,155.82 × 2,947.26
4. Step 4: Simplify right side
   5,185.30x = 21,090,062.05
5. Step 5: Solve for x
   x = 21,090,062.05/5,185.30
6. Step 6: Final answer
   x = 4,067.28