Finding the Fourth Proportional to 3,846.56, 5,768.42 and 1,380.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,846.56 : 5,768.42 = 1,380.71 : x
2. Step 2: Convert to fraction form
   3,846.56/5,768.42 = 1,380.71/x
3. Step 3: Cross multiply
   3,846.56x = 5,768.42 × 1,380.71
4. Step 4: Simplify right side
   3,846.56x = 7,964,522.70
5. Step 5: Solve for x
   x = 7,964,522.70/3,846.56
6. Step 6: Final answer
   x = 2,070.56