Finding the Fourth Proportional to 5,714.76, 7,881.30 and 3,854.28

Step by Step Solution

1. Step 1: Write the proportion equation
   5,714.76 : 7,881.30 = 3,854.28 : x
2. Step 2: Convert to fraction form
   5,714.76/7,881.30 = 3,854.28/x
3. Step 3: Cross multiply
   5,714.76x = 7,881.30 × 3,854.28
4. Step 4: Simplify right side
   5,714.76x = 30,376,736.96
5. Step 5: Solve for x
   x = 30,376,736.96/5,714.76
6. Step 6: Final answer
   x = 5,315.49