Finding the Fourth Proportional to 3,845.36, 5,756.28 and 2,108.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,845.36 : 5,756.28 = 2,108.72 : x
2. Step 2: Convert to fraction form
   3,845.36/5,756.28 = 2,108.72/x
3. Step 3: Cross multiply
   3,845.36x = 5,756.28 × 2,108.72
4. Step 4: Simplify right side
   3,845.36x = 12,138,382.76
5. Step 5: Solve for x
   x = 12,138,382.76/3,845.36
6. Step 6: Final answer
   x = 3,156.63