Finding the Fourth Proportional to 9,160.87, 12,638.63 and 5,574.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,160.87 : 12,638.63 = 5,574.37 : x
2. Step 2: Convert to fraction form
   9,160.87/12,638.63 = 5,574.37/x
3. Step 3: Cross multiply
   9,160.87x = 12,638.63 × 5,574.37
4. Step 4: Simplify right side
   9,160.87x = 70,452,413.85
5. Step 5: Solve for x
   x = 70,452,413.85/9,160.87
6. Step 6: Final answer
   x = 7,690.58