Finding the Fourth Proportional to 3,721.96, 5,131.94 and 2,543.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,721.96 : 5,131.94 = 2,543.72 : x
2. Step 2: Convert to fraction form
   3,721.96/5,131.94 = 2,543.72/x
3. Step 3: Cross multiply
   3,721.96x = 5,131.94 × 2,543.72
4. Step 4: Simplify right side
   3,721.96x = 13,054,218.42
5. Step 5: Solve for x
   x = 13,054,218.42/3,721.96
6. Step 6: Final answer
   x = 3,507.35