Finding the Fourth Proportional to 2,087.08, 2,880.69 and 1,248.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.08 : 2,880.69 = 1,248.28 : x
2. Step 2: Convert to fraction form
   2,087.08/2,880.69 = 1,248.28/x
3. Step 3: Cross multiply
   2,087.08x = 2,880.69 × 1,248.28
4. Step 4: Simplify right side
   2,087.08x = 3,595,901.47
5. Step 5: Solve for x
   x = 3,595,901.47/2,087.08
6. Step 6: Final answer
   x = 1,722.93