Finding the Fourth Proportional to 11,923.32, 16,442.73 and 7,142.49

Step by Step Solution

1. Step 1: Write the proportion equation
   11,923.32 : 16,442.73 = 7,142.49 : x
2. Step 2: Convert to fraction form
   11,923.32/16,442.73 = 7,142.49/x
3. Step 3: Cross multiply
   11,923.32x = 16,442.73 × 7,142.49
4. Step 4: Simplify right side
   11,923.32x = 117,442,034.60
5. Step 5: Solve for x
   x = 117,442,034.60/11,923.32
6. Step 6: Final answer
   x = 9,849.78