Finding the Fourth Proportional to 9,315.73, 12,858.24 and 5,540.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,315.73 : 12,858.24 = 5,540.32 : x
2. Step 2: Convert to fraction form
   9,315.73/12,858.24 = 5,540.32/x
3. Step 3: Cross multiply
   9,315.73x = 12,858.24 × 5,540.32
4. Step 4: Simplify right side
   9,315.73x = 71,238,764.24
5. Step 5: Solve for x
   x = 71,238,764.24/9,315.73
6. Step 6: Final answer
   x = 7,647.15