Finding the Fourth Proportional to 3,785.56, 5,224.38 and 2,389.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,785.56 : 5,224.38 = 2,389.72 : x
2. Step 2: Convert to fraction form
   3,785.56/5,224.38 = 2,389.72/x
3. Step 3: Cross multiply
   3,785.56x = 5,224.38 × 2,389.72
4. Step 4: Simplify right side
   3,785.56x = 12,484,805.37
5. Step 5: Solve for x
   x = 12,484,805.37/3,785.56
6. Step 6: Final answer
   x = 3,298.01