Finding the Fourth Proportional to 9,179.39, 12,668.15 and 5,146.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,179.39 : 12,668.15 = 5,146.50 : x
2. Step 2: Convert to fraction form
   9,179.39/12,668.15 = 5,146.50/x
3. Step 3: Cross multiply
   9,179.39x = 12,668.15 × 5,146.50
4. Step 4: Simplify right side
   9,179.39x = 65,196,608.24
5. Step 5: Solve for x
   x = 65,196,608.24/9,179.39
6. Step 6: Final answer
   x = 7,102.50