Finding the Fourth Proportional to 3,725.72, 5,139.72 and 2,715.26

Step by Step Solution

1. Step 1: Write the proportion equation
   3,725.72 : 5,139.72 = 2,715.26 : x
2. Step 2: Convert to fraction form
   3,725.72/5,139.72 = 2,715.26/x
3. Step 3: Cross multiply
   3,725.72x = 5,139.72 × 2,715.26
4. Step 4: Simplify right side
   3,725.72x = 13,955,678.79
5. Step 5: Solve for x
   x = 13,955,678.79/3,725.72
6. Step 6: Final answer
   x = 3,745.76