Finding the Fourth Proportional to 9,623.38, 13,280.16 and 5,431.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,623.38 : 13,280.16 = 5,431.54 : x
2. Step 2: Convert to fraction form
   9,623.38/13,280.16 = 5,431.54/x
3. Step 3: Cross multiply
   9,623.38x = 13,280.16 × 5,431.54
4. Step 4: Simplify right side
   9,623.38x = 72,131,720.25
5. Step 5: Solve for x
   x = 72,131,720.25/9,623.38
6. Step 6: Final answer
   x = 7,495.47