Finding the Fourth Proportional to 5,185.91, 7,156.51 and 2,828.15

Step by Step Solution

1. Step 1: Write the proportion equation
   5,185.91 : 7,156.51 = 2,828.15 : x
2. Step 2: Convert to fraction form
   5,185.91/7,156.51 = 2,828.15/x
3. Step 3: Cross multiply
   5,185.91x = 7,156.51 × 2,828.15
4. Step 4: Simplify right side
   5,185.91x = 20,239,683.76
5. Step 5: Solve for x
   x = 20,239,683.76/5,185.91
6. Step 6: Final answer
   x = 3,902.82