Finding the Fourth Proportional to 13,268.76, 18,271.39 and 12,974.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,268.76 : 18,271.39 = 12,974.10 : x
2. Step 2: Convert to fraction form
   13,268.76/18,271.39 = 12,974.10/x
3. Step 3: Cross multiply
   13,268.76x = 18,271.39 × 12,974.10
4. Step 4: Simplify right side
   13,268.76x = 237,054,841.00
5. Step 5: Solve for x
   x = 237,054,841.00/13,268.76
6. Step 6: Final answer
   x = 17,865.64