Finding the Fourth Proportional to 3,889.86, 5,806.53 and 3,600.75

Step by Step Solution

1. Step 1: Write the proportion equation
   3,889.86 : 5,806.53 = 3,600.75 : x
2. Step 2: Convert to fraction form
   3,889.86/5,806.53 = 3,600.75/x
3. Step 3: Cross multiply
   3,889.86x = 5,806.53 × 3,600.75
4. Step 4: Simplify right side
   3,889.86x = 20,907,862.90
5. Step 5: Solve for x
   x = 20,907,862.90/3,889.86
6. Step 6: Final answer
   x = 5,374.97