Finding the Fourth Proportional to 5,185.97, 7,156.50 and 2,828.12

Step by Step Solution

1. Step 1: Write the proportion equation
   5,185.97 : 7,156.50 = 2,828.12 : x
2. Step 2: Convert to fraction form
   5,185.97/7,156.50 = 2,828.12/x
3. Step 3: Cross multiply
   5,185.97x = 7,156.50 × 2,828.12
4. Step 4: Simplify right side
   5,185.97x = 20,239,410.30
5. Step 5: Solve for x
   x = 20,239,410.30/5,185.97
6. Step 6: Final answer
   x = 3,902.72