Finding the Fourth Proportional to 16,868.22, 23,269.86 and 10,905

Step by Step Solution

1. Step 1: Write the proportion equation
   16,868.22 : 23,269.86 = 10,905 : x
2. Step 2: Convert to fraction form
   16,868.22/23,269.86 = 10,905/x
3. Step 3: Cross multiply
   16,868.22x = 23,269.86 × 10,905
4. Step 4: Simplify right side
   16,868.22x = 253,757,823.30
5. Step 5: Solve for x
   x = 253,757,823.30/16,868.22
6. Step 6: Final answer
   x = 15,043.54