Finding the Fourth Proportional to 9,389.25, 12,956.49 and 5,355.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,389.25 : 12,956.49 = 5,355.59 : x
2. Step 2: Convert to fraction form
   9,389.25/12,956.49 = 5,355.59/x
3. Step 3: Cross multiply
   9,389.25x = 12,956.49 × 5,355.59
4. Step 4: Simplify right side
   9,389.25x = 69,389,583.50
5. Step 5: Solve for x
   x = 69,389,583.50/9,389.25
6. Step 6: Final answer
   x = 7,390.32