Finding the Fourth Proportional to 8,498.39, 11,728.56 and 5,142.03

Step by Step Solution

1. Step 1: Write the proportion equation
   8,498.39 : 11,728.56 = 5,142.03 : x
2. Step 2: Convert to fraction form
   8,498.39/11,728.56 = 5,142.03/x
3. Step 3: Cross multiply
   8,498.39x = 11,728.56 × 5,142.03
4. Step 4: Simplify right side
   8,498.39x = 60,308,582.68
5. Step 5: Solve for x
   x = 60,308,582.68/8,498.39
6. Step 6: Final answer
   x = 7,096.48