Finding the Fourth Proportional to 2,287.56, 3,156.72 and 1,356

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287.56 : 3,156.72 = 1,356 : x
2. Step 2: Convert to fraction form
   2,287.56/3,156.72 = 1,356/x
3. Step 3: Cross multiply
   2,287.56x = 3,156.72 × 1,356
4. Step 4: Simplify right side
   2,287.56x = 4,280,512.32
5. Step 5: Solve for x
   x = 4,280,512.32/2,287.56
6. Step 6: Final answer
   x = 1,871.21