Finding the Fourth Proportional to 3,868.28, 5,799.78 and 1,787.13

Step by Step Solution

1. Step 1: Write the proportion equation
   3,868.28 : 5,799.78 = 1,787.13 : x
2. Step 2: Convert to fraction form
   3,868.28/5,799.78 = 1,787.13/x
3. Step 3: Cross multiply
   3,868.28x = 5,799.78 × 1,787.13
4. Step 4: Simplify right side
   3,868.28x = 10,364,960.83
5. Step 5: Solve for x
   x = 10,364,960.83/3,868.28
6. Step 6: Final answer
   x = 2,679.48