Finding the Fourth Proportional to 12,351.78, 18,514.39 and 5,335.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,351.78 : 18,514.39 = 5,335.10 : x
2. Step 2: Convert to fraction form
   12,351.78/18,514.39 = 5,335.10/x
3. Step 3: Cross multiply
   12,351.78x = 18,514.39 × 5,335.10
4. Step 4: Simplify right side
   12,351.78x = 98,776,062.47
5. Step 5: Solve for x
   x = 98,776,062.47/12,351.78
6. Step 6: Final answer
   x = 7,996.91