Finding the Fourth Proportional to 2,887.56, 3,984.83 and 1,561.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,887.56 : 3,984.83 = 1,561.27 : x
2. Step 2: Convert to fraction form
   2,887.56/3,984.83 = 1,561.27/x
3. Step 3: Cross multiply
   2,887.56x = 3,984.83 × 1,561.27
4. Step 4: Simplify right side
   2,887.56x = 6,221,391.63
5. Step 5: Solve for x
   x = 6,221,391.63/2,887.56
6. Step 6: Final answer
   x = 2,154.55