Finding the Fourth Proportional to 10,831.55, 16,247.91 and 3,436.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,831.55 : 16,247.91 = 3,436.60 : x
2. Step 2: Convert to fraction form
   10,831.55/16,247.91 = 3,436.60/x
3. Step 3: Cross multiply
   10,831.55x = 16,247.91 × 3,436.60
4. Step 4: Simplify right side
   10,831.55x = 55,837,567.51
5. Step 5: Solve for x
   x = 55,837,567.51/10,831.55
6. Step 6: Final answer
   x = 5,155.09