Finding the Fourth Proportional to 5,185.15, 7,155.54 and 2,827.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,185.15 : 7,155.54 = 2,827.31 : x
2. Step 2: Convert to fraction form
   5,185.15/7,155.54 = 2,827.31/x
3. Step 3: Cross multiply
   5,185.15x = 7,155.54 × 2,827.31
4. Step 4: Simplify right side
   5,185.15x = 20,230,894.02
5. Step 5: Solve for x
   x = 20,230,894.02/5,185.15
6. Step 6: Final answer
   x = 3,901.70