Finding the Fourth Proportional to 2,087.54, 2,880.32 and 1,248.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.54 : 2,880.32 = 1,248.10 : x
2. Step 2: Convert to fraction form
   2,087.54/2,880.32 = 1,248.10/x
3. Step 3: Cross multiply
   2,087.54x = 2,880.32 × 1,248.10
4. Step 4: Simplify right side
   2,087.54x = 3,594,912.99
5. Step 5: Solve for x
   x = 3,594,912.99/2,087.54
6. Step 6: Final answer
   x = 1,722.09