Finding the Fourth Proportional to 9,389.82, 12,957.84 and 5,198.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,389.82 : 12,957.84 = 5,198.16 : x
2. Step 2: Convert to fraction form
   9,389.82/12,957.84 = 5,198.16/x
3. Step 3: Cross multiply
   9,389.82x = 12,957.84 × 5,198.16
4. Step 4: Simplify right side
   9,389.82x = 67,356,925.57
5. Step 5: Solve for x
   x = 67,356,925.57/9,389.82
6. Step 6: Final answer
   x = 7,173.40