Finding the Fourth Proportional to 13,310.72, 19,963.52 and 4,544.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,310.72 : 19,963.52 = 4,544.72 : x
2. Step 2: Convert to fraction form
   13,310.72/19,963.52 = 4,544.72/x
3. Step 3: Cross multiply
   13,310.72x = 19,963.52 × 4,544.72
4. Step 4: Simplify right side
   13,310.72x = 90,728,608.61
5. Step 5: Solve for x
   x = 90,728,608.61/13,310.72
6. Step 6: Final answer
   x = 6,816.21