Finding the Fourth Proportional to 9,603.88, 13,253.88 and 5,412.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,603.88 : 13,253.88 = 5,412.40 : x
2. Step 2: Convert to fraction form
   9,603.88/13,253.88 = 5,412.40/x
3. Step 3: Cross multiply
   9,603.88x = 13,253.88 × 5,412.40
4. Step 4: Simplify right side
   9,603.88x = 71,735,300.11
5. Step 5: Solve for x
   x = 71,735,300.11/9,603.88
6. Step 6: Final answer
   x = 7,469.41