Finding the Fourth Proportional to 12,336.78, 17,019.54 and 7,558.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,336.78 : 17,019.54 = 7,558.59 : x
2. Step 2: Convert to fraction form
   12,336.78/17,019.54 = 7,558.59/x
3. Step 3: Cross multiply
   12,336.78x = 17,019.54 × 7,558.59
4. Step 4: Simplify right side
   12,336.78x = 128,643,724.85
5. Step 5: Solve for x
   x = 128,643,724.85/12,336.78
6. Step 6: Final answer
   x = 10,427.66