Finding the Fourth Proportional to 7,822.15, 10,791.82 and 5,431.49

Step by Step Solution

1. Step 1: Write the proportion equation
   7,822.15 : 10,791.82 = 5,431.49 : x
2. Step 2: Convert to fraction form
   7,822.15/10,791.82 = 5,431.49/x
3. Step 3: Cross multiply
   7,822.15x = 10,791.82 × 5,431.49
4. Step 4: Simplify right side
   7,822.15x = 58,615,581.30
5. Step 5: Solve for x
   x = 58,615,581.30/7,822.15
6. Step 6: Final answer
   x = 7,493.54