Finding the Fourth Proportional to 9,956.72, 13,740.54 and 5,480.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,956.72 : 13,740.54 = 5,480.58 : x
2. Step 2: Convert to fraction form
   9,956.72/13,740.54 = 5,480.58/x
3. Step 3: Cross multiply
   9,956.72x = 13,740.54 × 5,480.58
4. Step 4: Simplify right side
   9,956.72x = 75,306,128.71
5. Step 5: Solve for x
   x = 75,306,128.71/9,956.72
6. Step 6: Final answer
   x = 7,563.35