Finding the Fourth Proportional to 2,688.33, 3,714.83 and 2,156.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,688.33 : 3,714.83 = 2,156.39 : x
2. Step 2: Convert to fraction form
   2,688.33/3,714.83 = 2,156.39/x
3. Step 3: Cross multiply
   2,688.33x = 3,714.83 × 2,156.39
4. Step 4: Simplify right side
   2,688.33x = 8,010,609.08
5. Step 5: Solve for x
   x = 8,010,609.08/2,688.33
6. Step 6: Final answer
   x = 2,979.77