Finding the Fourth Proportional to 16,945.80, 23,384.05 and 9,391.42

Step by Step Solution

1. Step 1: Write the proportion equation
   16,945.80 : 23,384.05 = 9,391.42 : x
2. Step 2: Convert to fraction form
   16,945.80/23,384.05 = 9,391.42/x
3. Step 3: Cross multiply
   16,945.80x = 23,384.05 × 9,391.42
4. Step 4: Simplify right side
   16,945.80x = 219,609,434.85
5. Step 5: Solve for x
   x = 219,609,434.85/16,945.80
6. Step 6: Final answer
   x = 12,959.52