Finding the Fourth Proportional to 9,423.39, 13,003.52 and 5,231.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,423.39 : 13,003.52 = 5,231.55 : x
2. Step 2: Convert to fraction form
   9,423.39/13,003.52 = 5,231.55/x
3. Step 3: Cross multiply
   9,423.39x = 13,003.52 × 5,231.55
4. Step 4: Simplify right side
   9,423.39x = 68,028,538.90
5. Step 5: Solve for x
   x = 68,028,538.90/9,423.39
6. Step 6: Final answer
   x = 7,219.12