Finding the Fourth Proportional to 12,980.82, 19,456.56 and 6,393.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,980.82 : 19,456.56 = 6,393.18 : x
2. Step 2: Convert to fraction form
   12,980.82/19,456.56 = 6,393.18/x
3. Step 3: Cross multiply
   12,980.82x = 19,456.56 × 6,393.18
4. Step 4: Simplify right side
   12,980.82x = 124,389,290.26
5. Step 5: Solve for x
   x = 124,389,290.26/12,980.82
6. Step 6: Final answer
   x = 9,582.54