Finding the Fourth Proportional to 2,787.20, 3,846.41 and 1,528.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,787.20 : 3,846.41 = 1,528.31 : x
2. Step 2: Convert to fraction form
   2,787.20/3,846.41 = 1,528.31/x
3. Step 3: Cross multiply
   2,787.20x = 3,846.41 × 1,528.31
4. Step 4: Simplify right side
   2,787.20x = 5,878,520.30
5. Step 5: Solve for x
   x = 5,878,520.30/2,787.20
6. Step 6: Final answer
   x = 2,109.11