Finding the Fourth Proportional to 13,411.99, 20,111.24 and 4,644.55

Step by Step Solution

1. Step 1: Write the proportion equation
   13,411.99 : 20,111.24 = 4,644.55 : x
2. Step 2: Convert to fraction form
   13,411.99/20,111.24 = 4,644.55/x
3. Step 3: Cross multiply
   13,411.99x = 20,111.24 × 4,644.55
4. Step 4: Simplify right side
   13,411.99x = 93,407,636.52
5. Step 5: Solve for x
   x = 93,407,636.52/13,411.99
6. Step 6: Final answer
   x = 6,964.49