Finding the Fourth Proportional to 13,494.42, 18,621.41 and 10,309.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,494.42 : 18,621.41 = 10,309.86 : x
2. Step 2: Convert to fraction form
   13,494.42/18,621.41 = 10,309.86/x
3. Step 3: Cross multiply
   13,494.42x = 18,621.41 × 10,309.86
4. Step 4: Simplify right side
   13,494.42x = 191,984,078.55
5. Step 5: Solve for x
   x = 191,984,078.55/13,494.42
6. Step 6: Final answer
   x = 14,226.92