Finding the Fourth Proportional to 12,352.78, 18,515.89 and 5,336.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,352.78 : 18,515.89 = 5,336.10 : x
2. Step 2: Convert to fraction form
   12,352.78/18,515.89 = 5,336.10/x
3. Step 3: Cross multiply
   12,352.78x = 18,515.89 × 5,336.10
4. Step 4: Simplify right side
   12,352.78x = 98,802,640.63
5. Step 5: Solve for x
   x = 98,802,640.63/12,352.78
6. Step 6: Final answer
   x = 7,998.41