Finding the Fourth Proportional to 12,819.09, 17,690.37 and 7,442.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,819.09 : 17,690.37 = 7,442.58 : x
2. Step 2: Convert to fraction form
   12,819.09/17,690.37 = 7,442.58/x
3. Step 3: Cross multiply
   12,819.09x = 17,690.37 × 7,442.58
4. Step 4: Simplify right side
   12,819.09x = 131,661,993.95
5. Step 5: Solve for x
   x = 131,661,993.95/12,819.09
6. Step 6: Final answer
   x = 10,270.78