Finding the Fourth Proportional to 5,186.16, 7,156.89 and 2,828.30

Step by Step Solution

1. Step 1: Write the proportion equation
   5,186.16 : 7,156.89 = 2,828.30 : x
2. Step 2: Convert to fraction form
   5,186.16/7,156.89 = 2,828.30/x
3. Step 3: Cross multiply
   5,186.16x = 7,156.89 × 2,828.30
4. Step 4: Simplify right side
   5,186.16x = 20,241,796.20
5. Step 5: Solve for x
   x = 20,241,796.20/5,186.16
6. Step 6: Final answer
   x = 3,903.04