Finding the Fourth Proportional to 3,682.56, 5,525.76 and 2,142.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,682.56 : 5,525.76 = 2,142.72 : x
2. Step 2: Convert to fraction form
   3,682.56/5,525.76 = 2,142.72/x
3. Step 3: Cross multiply
   3,682.56x = 5,525.76 × 2,142.72
4. Step 4: Simplify right side
   3,682.56x = 11,840,156.47
5. Step 5: Solve for x
   x = 11,840,156.47/3,682.56
6. Step 6: Final answer
   x = 3,215.20