Finding the Fourth Proportional to 12,739.86, 19,094.94 and 8,291.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,739.86 : 19,094.94 = 8,291.34 : x
2. Step 2: Convert to fraction form
   12,739.86/19,094.94 = 8,291.34/x
3. Step 3: Cross multiply
   12,739.86x = 19,094.94 × 8,291.34
4. Step 4: Simplify right side
   12,739.86x = 158,322,639.82
5. Step 5: Solve for x
   x = 158,322,639.82/12,739.86
6. Step 6: Final answer
   x = 12,427.35