Finding the Fourth Proportional to 2,787.52, 4,178.56 and 1,326.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,787.52 : 4,178.56 = 1,326.28 : x
2. Step 2: Convert to fraction form
   2,787.52/4,178.56 = 1,326.28/x
3. Step 3: Cross multiply
   2,787.52x = 4,178.56 × 1,326.28
4. Step 4: Simplify right side
   2,787.52x = 5,541,940.56
5. Step 5: Solve for x
   x = 5,541,940.56/2,787.52
6. Step 6: Final answer
   x = 1,988.13