Finding the Fourth Proportional to 3,858.72, 5,787.30 and 1,085.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,858.72 : 5,787.30 = 1,085.52 : x
2. Step 2: Convert to fraction form
   3,858.72/5,787.30 = 1,085.52/x
3. Step 3: Cross multiply
   3,858.72x = 5,787.30 × 1,085.52
4. Step 4: Simplify right side
   3,858.72x = 6,282,229.90
5. Step 5: Solve for x
   x = 6,282,229.90/3,858.72
6. Step 6: Final answer
   x = 1,628.06