Finding the Fourth Proportional to 9,368.54, 12,929.15 and 5,389.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,368.54 : 12,929.15 = 5,389.55 : x
2. Step 2: Convert to fraction form
   9,368.54/12,929.15 = 5,389.55/x
3. Step 3: Cross multiply
   9,368.54x = 12,929.15 × 5,389.55
4. Step 4: Simplify right side
   9,368.54x = 69,682,346.18
5. Step 5: Solve for x
   x = 69,682,346.18/9,368.54
6. Step 6: Final answer
   x = 7,437.91