Finding the Fourth Proportional to 11,890.48, 17,826.20 and 5,647.36

Step by Step Solution

1. Step 1: Write the proportion equation
   11,890.48 : 17,826.20 = 5,647.36 : x
2. Step 2: Convert to fraction form
   11,890.48/17,826.20 = 5,647.36/x
3. Step 3: Cross multiply
   11,890.48x = 17,826.20 × 5,647.36
4. Step 4: Simplify right side
   11,890.48x = 100,670,968.83
5. Step 5: Solve for x
   x = 100,670,968.83/11,890.48
6. Step 6: Final answer
   x = 8,466.52