Finding the Fourth Proportional to 9,362.31, 12,920.27 and 5,383.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,362.31 : 12,920.27 = 5,383.79 : x
2. Step 2: Convert to fraction form
   9,362.31/12,920.27 = 5,383.79/x
3. Step 3: Cross multiply
   9,362.31x = 12,920.27 × 5,383.79
4. Step 4: Simplify right side
   9,362.31x = 69,560,020.42
5. Step 5: Solve for x
   x = 69,560,020.42/9,362.31
6. Step 6: Final answer
   x = 7,429.79