Finding the Fourth Proportional to 13,443.16, 20,164.72 and 5,550.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,443.16 : 20,164.72 = 5,550.12 : x
2. Step 2: Convert to fraction form
   13,443.16/20,164.72 = 5,550.12/x
3. Step 3: Cross multiply
   13,443.16x = 20,164.72 × 5,550.12
4. Step 4: Simplify right side
   13,443.16x = 111,916,615.77
5. Step 5: Solve for x
   x = 111,916,615.77/13,443.16
6. Step 6: Final answer
   x = 8,325.17