Finding the Fourth Proportional to 12,647.81, 17,454.53 and 7,271.99

Step by Step Solution

1. Step 1: Write the proportion equation
   12,647.81 : 17,454.53 = 7,271.99 : x
2. Step 2: Convert to fraction form
   12,647.81/17,454.53 = 7,271.99/x
3. Step 3: Cross multiply
   12,647.81x = 17,454.53 × 7,271.99
4. Step 4: Simplify right side
   12,647.81x = 126,929,098.52
5. Step 5: Solve for x
   x = 126,929,098.52/12,647.81
6. Step 6: Final answer
   x = 10,035.66