Finding the Fourth Proportional to 9,401.57, 12,974.69 and 5,209.73

Step by Step Solution

1. Step 1: Write the proportion equation
   9,401.57 : 12,974.69 = 5,209.73 : x
2. Step 2: Convert to fraction form
   9,401.57/12,974.69 = 5,209.73/x
3. Step 3: Cross multiply
   9,401.57x = 12,974.69 × 5,209.73
4. Step 4: Simplify right side
   9,401.57x = 67,594,631.73
5. Step 5: Solve for x
   x = 67,594,631.73/9,401.57
6. Step 6: Final answer
   x = 7,189.72