Finding the Fourth Proportional to 11,912.73, 17,863.32 and 3,591.20

Step by Step Solution

1. Step 1: Write the proportion equation
   11,912.73 : 17,863.32 = 3,591.20 : x
2. Step 2: Convert to fraction form
   11,912.73/17,863.32 = 3,591.20/x
3. Step 3: Cross multiply
   11,912.73x = 17,863.32 × 3,591.20
4. Step 4: Simplify right side
   11,912.73x = 64,150,665.47
5. Step 5: Solve for x
   x = 64,150,665.47/11,912.73
6. Step 6: Final answer
   x = 5,385.05