Finding the Fourth Proportional to 2,815.86, 3,883.71 and 2,151.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,815.86 : 3,883.71 = 2,151.06 : x
2. Step 2: Convert to fraction form
   2,815.86/3,883.71 = 2,151.06/x
3. Step 3: Cross multiply
   2,815.86x = 3,883.71 × 2,151.06
4. Step 4: Simplify right side
   2,815.86x = 8,354,093.23
5. Step 5: Solve for x
   x = 8,354,093.23/2,815.86
6. Step 6: Final answer
   x = 2,966.80