Finding the Fourth Proportional to 12,723.10, 17,555.96 and 7,271.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,723.10 : 17,555.96 = 7,271.78 : x
2. Step 2: Convert to fraction form
   12,723.10/17,555.96 = 7,271.78/x
3. Step 3: Cross multiply
   12,723.10x = 17,555.96 × 7,271.78
4. Step 4: Simplify right side
   12,723.10x = 127,663,009.21
5. Step 5: Solve for x
   x = 127,663,009.21/12,723.10
6. Step 6: Final answer
   x = 10,033.96