Finding the Fourth Proportional to 9,167.61, 12,651.61 and 5,188.64

Step by Step Solution

1. Step 1: Write the proportion equation
   9,167.61 : 12,651.61 = 5,188.64 : x
2. Step 2: Convert to fraction form
   9,167.61/12,651.61 = 5,188.64/x
3. Step 3: Cross multiply
   9,167.61x = 12,651.61 × 5,188.64
4. Step 4: Simplify right side
   9,167.61x = 65,644,668.37
5. Step 5: Solve for x
   x = 65,644,668.37/9,167.61
6. Step 6: Final answer
   x = 7,160.50