Finding the Fourth Proportional to 12,879.58, 17,774.52 and 7,843

Step by Step Solution

1. Step 1: Write the proportion equation
   12,879.58 : 17,774.52 = 7,843 : x
2. Step 2: Convert to fraction form
   12,879.58/17,774.52 = 7,843/x
3. Step 3: Cross multiply
   12,879.58x = 17,774.52 × 7,843
4. Step 4: Simplify right side
   12,879.58x = 139,405,560.36
5. Step 5: Solve for x
   x = 139,405,560.36/12,879.58
6. Step 6: Final answer
   x = 10,823.77