Finding the Fourth Proportional to 5,186.16, 7,156.89 and 2,828.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,186.16 : 7,156.89 = 2,828.31 : x
2. Step 2: Convert to fraction form
   5,186.16/7,156.89 = 2,828.31/x
3. Step 3: Cross multiply
   5,186.16x = 7,156.89 × 2,828.31
4. Step 4: Simplify right side
   5,186.16x = 20,241,903.56
5. Step 5: Solve for x
   x = 20,241,903.56/5,186.16
6. Step 6: Final answer
   x = 3,903.06