Finding the Fourth Proportional to 3,879.76, 5,354.58 and 2,308.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,879.76 : 5,354.58 = 2,308.72 : x
2. Step 2: Convert to fraction form
   3,879.76/5,354.58 = 2,308.72/x
3. Step 3: Cross multiply
   3,879.76x = 5,354.58 × 2,308.72
4. Step 4: Simplify right side
   3,879.76x = 12,362,225.94
5. Step 5: Solve for x
   x = 12,362,225.94/3,879.76
6. Step 6: Final answer
   x = 3,186.34