Finding the Fourth Proportional to 3,887.72, 5,831.54 and 1,806.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,887.72 : 5,831.54 = 1,806.56 : x
2. Step 2: Convert to fraction form
   3,887.72/5,831.54 = 1,806.56/x
3. Step 3: Cross multiply
   3,887.72x = 5,831.54 × 1,806.56
4. Step 4: Simplify right side
   3,887.72x = 10,535,017.35
5. Step 5: Solve for x
   x = 10,535,017.35/3,887.72
6. Step 6: Final answer
   x = 2,709.82