Finding the Fourth Proportional to 9,175.60, 12,661.92 and 5,196.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,175.60 : 12,661.92 = 5,196.88 : x
2. Step 2: Convert to fraction form
   9,175.60/12,661.92 = 5,196.88/x
3. Step 3: Cross multiply
   9,175.60x = 12,661.92 × 5,196.88
4. Step 4: Simplify right side
   9,175.60x = 65,802,478.81
5. Step 5: Solve for x
   x = 65,802,478.81/9,175.60
6. Step 6: Final answer
   x = 7,171.46