Finding the Fourth Proportional to 9,151.91, 12,629.69 and 5,173.39

Step by Step Solution

1. Step 1: Write the proportion equation
   9,151.91 : 12,629.69 = 5,173.39 : x
2. Step 2: Convert to fraction form
   9,151.91/12,629.69 = 5,173.39/x
3. Step 3: Cross multiply
   9,151.91x = 12,629.69 × 5,173.39
4. Step 4: Simplify right side
   9,151.91x = 65,338,311.95
5. Step 5: Solve for x
   x = 65,338,311.95/9,151.91
6. Step 6: Final answer
   x = 7,139.31