Finding the Fourth Proportional to 2,787.56, 3,846.87 and 1,528.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,787.56 : 3,846.87 = 1,528.61 : x
2. Step 2: Convert to fraction form
   2,787.56/3,846.87 = 1,528.61/x
3. Step 3: Cross multiply
   2,787.56x = 3,846.87 × 1,528.61
4. Step 4: Simplify right side
   2,787.56x = 5,880,356.31
5. Step 5: Solve for x
   x = 5,880,356.31/2,787.56
6. Step 6: Final answer
   x = 2,109.50