Finding the Fourth Proportional to 2,186.29, 3,276.59 and 887.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.29 : 3,276.59 = 887.05 : x
2. Step 2: Convert to fraction form
   2,186.29/3,276.59 = 887.05/x
3. Step 3: Cross multiply
   2,186.29x = 3,276.59 × 887.05
4. Step 4: Simplify right side
   2,186.29x = 2,906,482.78
5. Step 5: Solve for x
   x = 2,906,482.78/2,186.29
6. Step 6: Final answer
   x = 1,329.42