Finding the Fourth Proportional to 12,707.78, 17,536.83 and 7,042.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,707.78 : 17,536.83 = 7,042.62 : x
2. Step 2: Convert to fraction form
   12,707.78/17,536.83 = 7,042.62/x
3. Step 3: Cross multiply
   12,707.78x = 17,536.83 × 7,042.62
4. Step 4: Simplify right side
   12,707.78x = 123,505,229.69
5. Step 5: Solve for x
   x = 123,505,229.69/12,707.78
6. Step 6: Final answer
   x = 9,718.87