Finding the Fourth Proportional to 11,231.94, 16,851.57 and 5,389.02

Step by Step Solution

1. Step 1: Write the proportion equation
   11,231.94 : 16,851.57 = 5,389.02 : x
2. Step 2: Convert to fraction form
   11,231.94/16,851.57 = 5,389.02/x
3. Step 3: Cross multiply
   11,231.94x = 16,851.57 × 5,389.02
4. Step 4: Simplify right side
   11,231.94x = 90,813,447.76
5. Step 5: Solve for x
   x = 90,813,447.76/11,231.94
6. Step 6: Final answer
   x = 8,085.29