Finding the Fourth Proportional to 10,391.72, 14,340.65 and 5,676.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,391.72 : 14,340.65 = 5,676.12 : x
2. Step 2: Convert to fraction form
   10,391.72/14,340.65 = 5,676.12/x
3. Step 3: Cross multiply
   10,391.72x = 14,340.65 × 5,676.12
4. Step 4: Simplify right side
   10,391.72x = 81,399,250.28
5. Step 5: Solve for x
   x = 81,399,250.28/10,391.72
6. Step 6: Final answer
   x = 7,833.09