Finding the Fourth Proportional to 2,800.54, 3,865.35 and 1,868.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,800.54 : 3,865.35 = 1,868.50 : x
2. Step 2: Convert to fraction form
   2,800.54/3,865.35 = 1,868.50/x
3. Step 3: Cross multiply
   2,800.54x = 3,865.35 × 1,868.50
4. Step 4: Simplify right side
   2,800.54x = 7,222,406.48
5. Step 5: Solve for x
   x = 7,222,406.48/2,800.54
6. Step 6: Final answer
   x = 2,578.93