Finding the Fourth Proportional to 5,676.36, 8,514.34 and 1,978.58

Step by Step Solution

1. Step 1: Write the proportion equation
   5,676.36 : 8,514.34 = 1,978.58 : x
2. Step 2: Convert to fraction form
   5,676.36/8,514.34 = 1,978.58/x
3. Step 3: Cross multiply
   5,676.36x = 8,514.34 × 1,978.58
4. Step 4: Simplify right side
   5,676.36x = 16,846,255.32
5. Step 5: Solve for x
   x = 16,846,255.32/5,676.36
6. Step 6: Final answer
   x = 2,967.79