Finding the Fourth Proportional to 12,855.55, 17,743.10 and 7,266.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,855.55 : 17,743.10 = 7,266.55 : x
2. Step 2: Convert to fraction form
   12,855.55/17,743.10 = 7,266.55/x
3. Step 3: Cross multiply
   12,855.55x = 17,743.10 × 7,266.55
4. Step 4: Simplify right side
   12,855.55x = 128,931,123.31
5. Step 5: Solve for x
   x = 128,931,123.31/12,855.55
6. Step 6: Final answer
   x = 10,029.22