Finding the Fourth Proportional to 5,111.33, 7,053.23 and 2,872.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.33 : 7,053.23 = 2,872.78 : x
2. Step 2: Convert to fraction form
   5,111.33/7,053.23 = 2,872.78/x
3. Step 3: Cross multiply
   5,111.33x = 7,053.23 × 2,872.78
4. Step 4: Simplify right side
   5,111.33x = 20,262,367.63
5. Step 5: Solve for x
   x = 20,262,367.63/5,111.33
6. Step 6: Final answer
   x = 3,964.21