Finding the Fourth Proportional to 10,919.65, 16,377.89 and 5,371.51

Step by Step Solution

1. Step 1: Write the proportion equation
   10,919.65 : 16,377.89 = 5,371.51 : x
2. Step 2: Convert to fraction form
   10,919.65/16,377.89 = 5,371.51/x
3. Step 3: Cross multiply
   10,919.65x = 16,377.89 × 5,371.51
4. Step 4: Simplify right side
   10,919.65x = 87,973,999.91
5. Step 5: Solve for x
   x = 87,973,999.91/10,919.65
6. Step 6: Final answer
   x = 8,056.49