Finding the Fourth Proportional to 9,351.09, 12,905.72 and 5,372.97

Step by Step Solution

1. Step 1: Write the proportion equation
   9,351.09 : 12,905.72 = 5,372.97 : x
2. Step 2: Convert to fraction form
   9,351.09/12,905.72 = 5,372.97/x
3. Step 3: Cross multiply
   9,351.09x = 12,905.72 × 5,372.97
4. Step 4: Simplify right side
   9,351.09x = 69,342,019.52
5. Step 5: Solve for x
   x = 69,342,019.52/9,351.09
6. Step 6: Final answer
   x = 7,415.39