Finding the Fourth Proportional to 11,969.60, 16,514.76 and 7,123.57

Step by Step Solution

1. Step 1: Write the proportion equation
   11,969.60 : 16,514.76 = 7,123.57 : x
2. Step 2: Convert to fraction form
   11,969.60/16,514.76 = 7,123.57/x
3. Step 3: Cross multiply
   11,969.60x = 16,514.76 × 7,123.57
4. Step 4: Simplify right side
   11,969.60x = 117,644,048.89
5. Step 5: Solve for x
   x = 117,644,048.89/11,969.60
6. Step 6: Final answer
   x = 9,828.57