Finding the Fourth Proportional to 2,580.30, 3,560.49 and 2,136.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,580.30 : 3,560.49 = 2,136.42 : x
2. Step 2: Convert to fraction form
   2,580.30/3,560.49 = 2,136.42/x
3. Step 3: Cross multiply
   2,580.30x = 3,560.49 × 2,136.42
4. Step 4: Simplify right side
   2,580.30x = 7,606,702.05
5. Step 5: Solve for x
   x = 7,606,702.05/2,580.30
6. Step 6: Final answer
   x = 2,947.99