Finding the Fourth Proportional to 9,175.86, 12,662.78 and 5,196.87

Step by Step Solution

1. Step 1: Write the proportion equation
   9,175.86 : 12,662.78 = 5,196.87 : x
2. Step 2: Convert to fraction form
   9,175.86/12,662.78 = 5,196.87/x
3. Step 3: Cross multiply
   9,175.86x = 12,662.78 × 5,196.87
4. Step 4: Simplify right side
   9,175.86x = 65,806,795.51
5. Step 5: Solve for x
   x = 65,806,795.51/9,175.86
6. Step 6: Final answer
   x = 7,171.73