Finding the Fourth Proportional to 12,856.79, 19,287.34 and 4,094.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,856.79 : 19,287.34 = 4,094.39 : x
2. Step 2: Convert to fraction form
   12,856.79/19,287.34 = 4,094.39/x
3. Step 3: Cross multiply
   12,856.79x = 19,287.34 × 4,094.39
4. Step 4: Simplify right side
   12,856.79x = 78,969,785.35
5. Step 5: Solve for x
   x = 78,969,785.35/12,856.79
6. Step 6: Final answer
   x = 6,142.27