Finding the Fourth Proportional to 23,269.68, 34,911 and 12,888.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,269.68 : 34,911 = 12,888.72 : x
2. Step 2: Convert to fraction form
   23,269.68/34,911 = 12,888.72/x
3. Step 3: Cross multiply
   23,269.68x = 34,911 × 12,888.72
4. Step 4: Simplify right side
   23,269.68x = 449,958,103.92
5. Step 5: Solve for x
   x = 449,958,103.92/23,269.68
6. Step 6: Final answer
   x = 19,336.67