Finding the Fourth Proportional to 8,919.23, 12,308.69 and 5,381.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,919.23 : 12,308.69 = 5,381.69 : x
2. Step 2: Convert to fraction form
   8,919.23/12,308.69 = 5,381.69/x
3. Step 3: Cross multiply
   8,919.23x = 12,308.69 × 5,381.69
4. Step 4: Simplify right side
   8,919.23x = 66,241,505.80
5. Step 5: Solve for x
   x = 66,241,505.80/8,919.23
6. Step 6: Final answer
   x = 7,426.82