Finding the Fourth Proportional to 3,845.31, 5,768.73 and 1,380.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,845.31 : 5,768.73 = 1,380.32 : x
2. Step 2: Convert to fraction form
   3,845.31/5,768.73 = 1,380.32/x
3. Step 3: Cross multiply
   3,845.31x = 5,768.73 × 1,380.32
4. Step 4: Simplify right side
   3,845.31x = 7,962,661.10
5. Step 5: Solve for x
   x = 7,962,661.10/3,845.31
6. Step 6: Final answer
   x = 2,070.74