Finding the Fourth Proportional to 5,111.39, 7,051.72 and 2,872.75

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.39 : 7,051.72 = 2,872.75 : x
2. Step 2: Convert to fraction form
   5,111.39/7,051.72 = 2,872.75/x
3. Step 3: Cross multiply
   5,111.39x = 7,051.72 × 2,872.75
4. Step 4: Simplify right side
   5,111.39x = 20,257,828.63
5. Step 5: Solve for x
   x = 20,257,828.63/5,111.39
6. Step 6: Final answer
   x = 3,963.27