Finding the Fourth Proportional to 12,911.63, 19,364.71 and 4,144.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,911.63 : 19,364.71 = 4,144.49 : x
2. Step 2: Convert to fraction form
   12,911.63/19,364.71 = 4,144.49/x
3. Step 3: Cross multiply
   12,911.63x = 19,364.71 × 4,144.49
4. Step 4: Simplify right side
   12,911.63x = 80,256,846.95
5. Step 5: Solve for x
   x = 80,256,846.95/12,911.63
6. Step 6: Final answer
   x = 6,215.86