Finding the Fourth Proportional to 9,388.20, 12,956.12 and 5,196.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,388.20 : 12,956.12 = 5,196.45 : x
2. Step 2: Convert to fraction form
   9,388.20/12,956.12 = 5,196.45/x
3. Step 3: Cross multiply
   9,388.20x = 12,956.12 × 5,196.45
4. Step 4: Simplify right side
   9,388.20x = 67,325,829.77
5. Step 5: Solve for x
   x = 67,325,829.77/9,388.20
6. Step 6: Final answer
   x = 7,171.32