Finding the Fourth Proportional to 9,389.89, 12,958.95 and 5,198.14

Step by Step Solution

1. Step 1: Write the proportion equation
   9,389.89 : 12,958.95 = 5,198.14 : x
2. Step 2: Convert to fraction form
   9,389.89/12,958.95 = 5,198.14/x
3. Step 3: Cross multiply
   9,389.89x = 12,958.95 × 5,198.14
4. Step 4: Simplify right side
   9,389.89x = 67,362,436.35
5. Step 5: Solve for x
   x = 67,362,436.35/9,389.89
6. Step 6: Final answer
   x = 7,173.93