Finding the Fourth Proportional to 2,787.51, 3,846.71 and 1,528.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,787.51 : 3,846.71 = 1,528.57 : x
2. Step 2: Convert to fraction form
   2,787.51/3,846.71 = 1,528.57/x
3. Step 3: Cross multiply
   2,787.51x = 3,846.71 × 1,528.57
4. Step 4: Simplify right side
   2,787.51x = 5,879,965.50
5. Step 5: Solve for x
   x = 5,879,965.50/2,787.51
6. Step 6: Final answer
   x = 2,109.40