Finding the Fourth Proportional to 9,174, 12,662.48 and 5,591.39

Step by Step Solution

1. Step 1: Write the proportion equation
   9,174 : 12,662.48 = 5,591.39 : x
2. Step 2: Convert to fraction form
   9,174/12,662.48 = 5,591.39/x
3. Step 3: Cross multiply
   9,174x = 12,662.48 × 5,591.39
4. Step 4: Simplify right side
   9,174x = 70,800,772.78
5. Step 5: Solve for x
   x = 70,800,772.78/9,174
6. Step 6: Final answer
   x = 7,717.55