Finding the Fourth Proportional to 9,962.40, 13,747.57 and 5,485.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,962.40 : 13,747.57 = 5,485.30 : x
2. Step 2: Convert to fraction form
   9,962.40/13,747.57 = 5,485.30/x
3. Step 3: Cross multiply
   9,962.40x = 13,747.57 × 5,485.30
4. Step 4: Simplify right side
   9,962.40x = 75,409,545.72
5. Step 5: Solve for x
   x = 75,409,545.72/9,962.40
6. Step 6: Final answer
   x = 7,569.42