Finding the Fourth Proportional to 12,739.08, 19,111.42 and 5,339.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,739.08 : 19,111.42 = 5,339.73 : x
2. Step 2: Convert to fraction form
   12,739.08/19,111.42 = 5,339.73/x
3. Step 3: Cross multiply
   12,739.08x = 19,111.42 × 5,339.73
4. Step 4: Simplify right side
   12,739.08x = 102,049,822.72
5. Step 5: Solve for x
   x = 102,049,822.72/12,739.08
6. Step 6: Final answer
   x = 8,010.77