Finding the Fourth Proportional to 2,071.78, 2,855.45 and 1,511.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.78 : 2,855.45 = 1,511.33 : x
2. Step 2: Convert to fraction form
   2,071.78/2,855.45 = 1,511.33/x
3. Step 3: Cross multiply
   2,071.78x = 2,855.45 × 1,511.33
4. Step 4: Simplify right side
   2,071.78x = 4,315,516.75
5. Step 5: Solve for x
   x = 4,315,516.75/2,071.78
6. Step 6: Final answer
   x = 2,083.00