Finding the Fourth Proportional to 13,105.81, 19,644.86 and 8,935.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,105.81 : 19,644.86 = 8,935.48 : x
2. Step 2: Convert to fraction form
   13,105.81/19,644.86 = 8,935.48/x
3. Step 3: Cross multiply
   13,105.81x = 19,644.86 × 8,935.48
4. Step 4: Simplify right side
   13,105.81x = 175,536,226.86
5. Step 5: Solve for x
   x = 175,536,226.86/13,105.81
6. Step 6: Final answer
   x = 13,393.77