Finding the Fourth Proportional to 2,736.60, 4,105.55 and 887.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,736.60 : 4,105.55 = 887.72 : x
2. Step 2: Convert to fraction form
   2,736.60/4,105.55 = 887.72/x
3. Step 3: Cross multiply
   2,736.60x = 4,105.55 × 887.72
4. Step 4: Simplify right side
   2,736.60x = 3,644,578.85
5. Step 5: Solve for x
   x = 3,644,578.85/2,736.60
6. Step 6: Final answer
   x = 1,331.79