Finding the Fourth Proportional to 8,488.79, 12,738.14 and 3,558.01

Step by Step Solution

1. Step 1: Write the proportion equation
   8,488.79 : 12,738.14 = 3,558.01 : x
2. Step 2: Convert to fraction form
   8,488.79/12,738.14 = 3,558.01/x
3. Step 3: Cross multiply
   8,488.79x = 12,738.14 × 3,558.01
4. Step 4: Simplify right side
   8,488.79x = 45,322,429.50
5. Step 5: Solve for x
   x = 45,322,429.50/8,488.79
6. Step 6: Final answer
   x = 5,339.09