Finding the Fourth Proportional to 9,955.20, 13,738.15 and 5,479.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,955.20 : 13,738.15 = 5,479.02 : x
2. Step 2: Convert to fraction form
   9,955.20/13,738.15 = 5,479.02/x
3. Step 3: Cross multiply
   9,955.20x = 13,738.15 × 5,479.02
4. Step 4: Simplify right side
   9,955.20x = 75,271,598.61
5. Step 5: Solve for x
   x = 75,271,598.61/9,955.20
6. Step 6: Final answer
   x = 7,561.03