Finding the Fourth Proportional to 2,520.61, 3,479.72 and 1,576.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.61 : 3,479.72 = 1,576.96 : x
2. Step 2: Convert to fraction form
   2,520.61/3,479.72 = 1,576.96/x
3. Step 3: Cross multiply
   2,520.61x = 3,479.72 × 1,576.96
4. Step 4: Simplify right side
   2,520.61x = 5,487,379.25
5. Step 5: Solve for x
   x = 5,487,379.25/2,520.61
6. Step 6: Final answer
   x = 2,177.00