Finding the Fourth Proportional to 11,967.72, 17,959.32 and 5,042.28

Step by Step Solution

1. Step 1: Write the proportion equation
   11,967.72 : 17,959.32 = 5,042.28 : x
2. Step 2: Convert to fraction form
   11,967.72/17,959.32 = 5,042.28/x
3. Step 3: Cross multiply
   11,967.72x = 17,959.32 × 5,042.28
4. Step 4: Simplify right side
   11,967.72x = 90,555,920.05
5. Step 5: Solve for x
   x = 90,555,920.05/11,967.72
6. Step 6: Final answer
   x = 7,566.68