Finding the Fourth Proportional to 9,955.56, 13,738.38 and 5,479.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,955.56 : 13,738.38 = 5,479.31 : x
2. Step 2: Convert to fraction form
   9,955.56/13,738.38 = 5,479.31/x
3. Step 3: Cross multiply
   9,955.56x = 13,738.38 × 5,479.31
4. Step 4: Simplify right side
   9,955.56x = 75,276,856.62
5. Step 5: Solve for x
   x = 75,276,856.62/9,955.56
6. Step 6: Final answer
   x = 7,561.29