Finding the Fourth Proportional to 5,111.07, 7,053.34 and 2,872.81

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.07 : 7,053.34 = 2,872.81 : x
2. Step 2: Convert to fraction form
   5,111.07/7,053.34 = 2,872.81/x
3. Step 3: Cross multiply
   5,111.07x = 7,053.34 × 2,872.81
4. Step 4: Simplify right side
   5,111.07x = 20,262,905.69
5. Step 5: Solve for x
   x = 20,262,905.69/5,111.07
6. Step 6: Final answer
   x = 3,964.52