Finding the Fourth Proportional to 2,087.69, 2,880.82 and 1,248.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.69 : 2,880.82 = 1,248.23 : x
2. Step 2: Convert to fraction form
   2,087.69/2,880.82 = 1,248.23/x
3. Step 3: Cross multiply
   2,087.69x = 2,880.82 × 1,248.23
4. Step 4: Simplify right side
   2,087.69x = 3,595,925.95
5. Step 5: Solve for x
   x = 3,595,925.95/2,087.69
6. Step 6: Final answer
   x = 1,722.44