Finding the Fourth Proportional to 3,787.91, 5,227.56 and 2,528.17

Step by Step Solution

1. Step 1: Write the proportion equation
   3,787.91 : 5,227.56 = 2,528.17 : x
2. Step 2: Convert to fraction form
   3,787.91/5,227.56 = 2,528.17/x
3. Step 3: Cross multiply
   3,787.91x = 5,227.56 × 2,528.17
4. Step 4: Simplify right side
   3,787.91x = 13,216,147.30
5. Step 5: Solve for x
   x = 13,216,147.30/3,787.91
6. Step 6: Final answer
   x = 3,489.04