Finding the Fourth Proportional to 2,576.56, 3,861.45 and 1,407.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,576.56 : 3,861.45 = 1,407.08 : x
2. Step 2: Convert to fraction form
   2,576.56/3,861.45 = 1,407.08/x
3. Step 3: Cross multiply
   2,576.56x = 3,861.45 × 1,407.08
4. Step 4: Simplify right side
   2,576.56x = 5,433,369.07
5. Step 5: Solve for x
   x = 5,433,369.07/2,576.56
6. Step 6: Final answer
   x = 2,108.77