Finding the Fourth Proportional to 3,725.15, 5,141.19 and 2,131.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,725.15 : 5,141.19 = 2,131.50 : x
2. Step 2: Convert to fraction form
   3,725.15/5,141.19 = 2,131.50/x
3. Step 3: Cross multiply
   3,725.15x = 5,141.19 × 2,131.50
4. Step 4: Simplify right side
   3,725.15x = 10,958,446.49
5. Step 5: Solve for x
   x = 10,958,446.49/3,725.15
6. Step 6: Final answer
   x = 2,941.75