Finding the Fourth Proportional to 9,956.28, 13,740.17 and 5,479.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,956.28 : 13,740.17 = 5,479.99 : x
2. Step 2: Convert to fraction form
   9,956.28/13,740.17 = 5,479.99/x
3. Step 3: Cross multiply
   9,956.28x = 13,740.17 × 5,479.99
4. Step 4: Simplify right side
   9,956.28x = 75,295,932.45
5. Step 5: Solve for x
   x = 75,295,932.45/9,956.28
6. Step 6: Final answer
   x = 7,562.65