Finding the Fourth Proportional to 12,872.52, 19,307.57 and 4,105.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,872.52 : 19,307.57 = 4,105.89 : x
2. Step 2: Convert to fraction form
   12,872.52/19,307.57 = 4,105.89/x
3. Step 3: Cross multiply
   12,872.52x = 19,307.57 × 4,105.89
4. Step 4: Simplify right side
   12,872.52x = 79,274,738.06
5. Step 5: Solve for x
   x = 79,274,738.06/12,872.52
6. Step 6: Final answer
   x = 6,158.45