Finding the Fourth Proportional to 9,580.51, 13,222.38 and 5,389.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,580.51 : 13,222.38 = 5,389.57 : x
2. Step 2: Convert to fraction form
   9,580.51/13,222.38 = 5,389.57/x
3. Step 3: Cross multiply
   9,580.51x = 13,222.38 × 5,389.57
4. Step 4: Simplify right side
   9,580.51x = 71,262,942.58
5. Step 5: Solve for x
   x = 71,262,942.58/9,580.51
6. Step 6: Final answer
   x = 7,438.32