Finding the Fourth Proportional to 9,372.42, 12,933.68 and 5,390.73

Step by Step Solution

1. Step 1: Write the proportion equation
   9,372.42 : 12,933.68 = 5,390.73 : x
2. Step 2: Convert to fraction form
   9,372.42/12,933.68 = 5,390.73/x
3. Step 3: Cross multiply
   9,372.42x = 12,933.68 × 5,390.73
4. Step 4: Simplify right side
   9,372.42x = 69,721,949.83
5. Step 5: Solve for x
   x = 69,721,949.83/9,372.42
6. Step 6: Final answer
   x = 7,439.06