Finding the Fourth Proportional to 23,271.68, 34,914 and 12,890.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,271.68 : 34,914 = 12,890.72 : x
2. Step 2: Convert to fraction form
   23,271.68/34,914 = 12,890.72/x
3. Step 3: Cross multiply
   23,271.68x = 34,914 × 12,890.72
4. Step 4: Simplify right side
   23,271.68x = 450,066,598.08
5. Step 5: Solve for x
   x = 450,066,598.08/23,271.68
6. Step 6: Final answer
   x = 19,339.67