Finding the Fourth Proportional to 3,847.78, 5,768.04 and 1,872.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,847.78 : 5,768.04 = 1,872.16 : x
2. Step 2: Convert to fraction form
   3,847.78/5,768.04 = 1,872.16/x
3. Step 3: Cross multiply
   3,847.78x = 5,768.04 × 1,872.16
4. Step 4: Simplify right side
   3,847.78x = 10,798,693.77
5. Step 5: Solve for x
   x = 10,798,693.77/3,847.78
6. Step 6: Final answer
   x = 2,806.47