Finding the Fourth Proportional to 2,559.81, 3,531.71 and 1,511.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,559.81 : 3,531.71 = 1,511.67 : x
2. Step 2: Convert to fraction form
   2,559.81/3,531.71 = 1,511.67/x
3. Step 3: Cross multiply
   2,559.81x = 3,531.71 × 1,511.67
4. Step 4: Simplify right side
   2,559.81x = 5,338,772.50
5. Step 5: Solve for x
   x = 5,338,772.50/2,559.81
6. Step 6: Final answer
   x = 2,085.61