Finding the Fourth Proportional to 3,643.92, 5,027.72 and 2,131.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,643.92 : 5,027.72 = 2,131.25 : x
2. Step 2: Convert to fraction form
   3,643.92/5,027.72 = 2,131.25/x
3. Step 3: Cross multiply
   3,643.92x = 5,027.72 × 2,131.25
4. Step 4: Simplify right side
   3,643.92x = 10,715,292.46
5. Step 5: Solve for x
   x = 10,715,292.46/3,643.92
6. Step 6: Final answer
   x = 2,940.59