Finding the Fourth Proportional to 2,576.59, 3,866.31 and 1,406.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,576.59 : 3,866.31 = 1,406.55 : x
2. Step 2: Convert to fraction form
   2,576.59/3,866.31 = 1,406.55/x
3. Step 3: Cross multiply
   2,576.59x = 3,866.31 × 1,406.55
4. Step 4: Simplify right side
   2,576.59x = 5,438,158.33
5. Step 5: Solve for x
   x = 5,438,158.33/2,576.59
6. Step 6: Final answer
   x = 2,110.60