Finding the Fourth Proportional to 9,956.81, 13,740.16 and 5,480.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,956.81 : 13,740.16 = 5,480.55 : x
2. Step 2: Convert to fraction form
   9,956.81/13,740.16 = 5,480.55/x
3. Step 3: Cross multiply
   9,956.81x = 13,740.16 × 5,480.55
4. Step 4: Simplify right side
   9,956.81x = 75,303,633.89
5. Step 5: Solve for x
   x = 75,303,633.89/9,956.81
6. Step 6: Final answer
   x = 7,563.03