Finding the Fourth Proportional to 9,147.69, 12,626.79 and 5,370.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,147.69 : 12,626.79 = 5,370.76 : x
2. Step 2: Convert to fraction form
   9,147.69/12,626.79 = 5,370.76/x
3. Step 3: Cross multiply
   9,147.69x = 12,626.79 × 5,370.76
4. Step 4: Simplify right side
   9,147.69x = 67,815,395.53
5. Step 5: Solve for x
   x = 67,815,395.53/9,147.69
6. Step 6: Final answer
   x = 7,413.39