Finding the Fourth Proportional to 3,900.87, 5,382.89 and 2,307.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,900.87 : 5,382.89 = 2,307.42 : x
2. Step 2: Convert to fraction form
   3,900.87/5,382.89 = 2,307.42/x
3. Step 3: Cross multiply
   3,900.87x = 5,382.89 × 2,307.42
4. Step 4: Simplify right side
   3,900.87x = 12,420,576.51
5. Step 5: Solve for x
   x = 12,420,576.51/3,900.87
6. Step 6: Final answer
   x = 3,184.05