Finding the Fourth Proportional to 12,906.10, 19,360.59 and 4,137.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,906.10 : 19,360.59 = 4,137.94 : x
2. Step 2: Convert to fraction form
   12,906.10/19,360.59 = 4,137.94/x
3. Step 3: Cross multiply
   12,906.10x = 19,360.59 × 4,137.94
4. Step 4: Simplify right side
   12,906.10x = 80,112,959.78
5. Step 5: Solve for x
   x = 80,112,959.78/12,906.10
6. Step 6: Final answer
   x = 6,207.37