Finding the Fourth Proportional to 9,316.42, 12,854.30 and 5,540.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,316.42 : 12,854.30 = 5,540.40 : x
2. Step 2: Convert to fraction form
   9,316.42/12,854.30 = 5,540.40/x
3. Step 3: Cross multiply
   9,316.42x = 12,854.30 × 5,540.40
4. Step 4: Simplify right side
   9,316.42x = 71,217,936.02
5. Step 5: Solve for x
   x = 71,217,936.02/9,316.42
6. Step 6: Final answer
   x = 7,644.35