Finding the Fourth Proportional to 3,900.42, 5,383.53 and 2,576.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,900.42 : 5,383.53 = 2,576.34 : x
2. Step 2: Convert to fraction form
   3,900.42/5,383.53 = 2,576.34/x
3. Step 3: Cross multiply
   3,900.42x = 5,383.53 × 2,576.34
4. Step 4: Simplify right side
   3,900.42x = 13,869,803.68
5. Step 5: Solve for x
   x = 13,869,803.68/3,900.42
6. Step 6: Final answer
   x = 3,555.98