Finding the Fourth Proportional to 9,581.63, 13,223.25 and 5,389.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,581.63 : 13,223.25 = 5,389.88 : x
2. Step 2: Convert to fraction form
   9,581.63/13,223.25 = 5,389.88/x
3. Step 3: Cross multiply
   9,581.63x = 13,223.25 × 5,389.88
4. Step 4: Simplify right side
   9,581.63x = 71,271,664.59
5. Step 5: Solve for x
   x = 71,271,664.59/9,581.63
6. Step 6: Final answer
   x = 7,438.37