Finding the Fourth Proportional to 9,389.28, 12,956.40 and 5,196.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,389.28 : 12,956.40 = 5,196.48 : x
2. Step 2: Convert to fraction form
   9,389.28/12,956.40 = 5,196.48/x
3. Step 3: Cross multiply
   9,389.28x = 12,956.40 × 5,196.48
4. Step 4: Simplify right side
   9,389.28x = 67,327,673.47
5. Step 5: Solve for x
   x = 67,327,673.47/9,389.28
6. Step 6: Final answer
   x = 7,170.70