Finding the Fourth Proportional to 12,708.22, 17,538.04 and 7,042.85

Step by Step Solution

1. Step 1: Write the proportion equation
   12,708.22 : 17,538.04 = 7,042.85 : x
2. Step 2: Convert to fraction form
   12,708.22/17,538.04 = 7,042.85/x
3. Step 3: Cross multiply
   12,708.22x = 17,538.04 × 7,042.85
4. Step 4: Simplify right side
   12,708.22x = 123,517,771.90
5. Step 5: Solve for x
   x = 123,517,771.90/12,708.22
6. Step 6: Final answer
   x = 9,719.52