Finding the Fourth Proportional to 15,443.32, 21,311.78 and 8,369.75

Step by Step Solution

1. Step 1: Write the proportion equation
   15,443.32 : 21,311.78 = 8,369.75 : x
2. Step 2: Convert to fraction form
   15,443.32/21,311.78 = 8,369.75/x
3. Step 3: Cross multiply
   15,443.32x = 21,311.78 × 8,369.75
4. Step 4: Simplify right side
   15,443.32x = 178,374,164.10
5. Step 5: Solve for x
   x = 178,374,164.10/15,443.32
6. Step 6: Final answer
   x = 11,550.25