Finding the Fourth Proportional to 13,493.52, 18,613.98 and 10,978.44

Step by Step Solution

1. Step 1: Write the proportion equation
   13,493.52 : 18,613.98 = 10,978.44 : x
2. Step 2: Convert to fraction form
   13,493.52/18,613.98 = 10,978.44/x
3. Step 3: Cross multiply
   13,493.52x = 18,613.98 × 10,978.44
4. Step 4: Simplify right side
   13,493.52x = 204,352,462.59
5. Step 5: Solve for x
   x = 204,352,462.59/13,493.52
6. Step 6: Final answer
   x = 15,144.49