Finding the Fourth Proportional to 2,087.58, 2,880.78 and 1,203.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.58 : 2,880.78 = 1,203.54 : x
2. Step 2: Convert to fraction form
   2,087.58/2,880.78 = 1,203.54/x
3. Step 3: Cross multiply
   2,087.58x = 2,880.78 × 1,203.54
4. Step 4: Simplify right side
   2,087.58x = 3,467,133.96
5. Step 5: Solve for x
   x = 3,467,133.96/2,087.58
6. Step 6: Final answer
   x = 1,660.84