Finding the Fourth Proportional to 15,443.19, 21,311.55 and 8,369.60

Step by Step Solution

1. Step 1: Write the proportion equation
   15,443.19 : 21,311.55 = 8,369.60 : x
2. Step 2: Convert to fraction form
   15,443.19/21,311.55 = 8,369.60/x
3. Step 3: Cross multiply
   15,443.19x = 21,311.55 × 8,369.60
4. Step 4: Simplify right side
   15,443.19x = 178,369,042.32
5. Step 5: Solve for x
   x = 178,369,042.32/15,443.19
6. Step 6: Final answer
   x = 11,550.01