Finding the Fourth Proportional to 9,388.96, 12,956.32 and 5,197.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,388.96 : 12,956.32 = 5,197.12 : x
2. Step 2: Convert to fraction form
   9,388.96/12,956.32 = 5,197.12/x
3. Step 3: Cross multiply
   9,388.96x = 12,956.32 × 5,197.12
4. Step 4: Simplify right side
   9,388.96x = 67,335,549.80
5. Step 5: Solve for x
   x = 67,335,549.80/9,388.96
6. Step 6: Final answer
   x = 7,171.78