Finding the Fourth Proportional to 3,868.18, 5,804.12 and 1,787.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,868.18 : 5,804.12 = 1,787.15 : x
2. Step 2: Convert to fraction form
   3,868.18/5,804.12 = 1,787.15/x
3. Step 3: Cross multiply
   3,868.18x = 5,804.12 × 1,787.15
4. Step 4: Simplify right side
   3,868.18x = 10,372,852.04
5. Step 5: Solve for x
   x = 10,372,852.04/3,868.18
6. Step 6: Final answer
   x = 2,681.59