Finding the Fourth Proportional to 5,162.15, 7,123.77 and 2,804.28

Step by Step Solution

1. Step 1: Write the proportion equation
   5,162.15 : 7,123.77 = 2,804.28 : x
2. Step 2: Convert to fraction form
   5,162.15/7,123.77 = 2,804.28/x
3. Step 3: Cross multiply
   5,162.15x = 7,123.77 × 2,804.28
4. Step 4: Simplify right side
   5,162.15x = 19,977,045.74
5. Step 5: Solve for x
   x = 19,977,045.74/5,162.15
6. Step 6: Final answer
   x = 3,869.91