Finding the Fourth Proportional to 11,449.91, 17,152.58 and 8,442.47

Step by Step Solution

1. Step 1: Write the proportion equation
   11,449.91 : 17,152.58 = 8,442.47 : x
2. Step 2: Convert to fraction form
   11,449.91/17,152.58 = 8,442.47/x
3. Step 3: Cross multiply
   11,449.91x = 17,152.58 × 8,442.47
4. Step 4: Simplify right side
   11,449.91x = 144,810,142.07
5. Step 5: Solve for x
   x = 144,810,142.07/11,449.91
6. Step 6: Final answer
   x = 12,647.27