Finding the Fourth Proportional to 9,367.16, 12,922.62 and 5,639

Step by Step Solution

1. Step 1: Write the proportion equation
   9,367.16 : 12,922.62 = 5,639 : x
2. Step 2: Convert to fraction form
   9,367.16/12,922.62 = 5,639/x
3. Step 3: Cross multiply
   9,367.16x = 12,922.62 × 5,639
4. Step 4: Simplify right side
   9,367.16x = 72,870,654.18
5. Step 5: Solve for x
   x = 72,870,654.18/9,367.16
6. Step 6: Final answer
   x = 7,779.38