Finding the Fourth Proportional to 8,498.62, 11,728.35 and 5,142.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,498.62 : 11,728.35 = 5,142.05 : x
2. Step 2: Convert to fraction form
   8,498.62/11,728.35 = 5,142.05/x
3. Step 3: Cross multiply
   8,498.62x = 11,728.35 × 5,142.05
4. Step 4: Simplify right side
   8,498.62x = 60,307,677.77
5. Step 5: Solve for x
   x = 60,307,677.77/8,498.62
6. Step 6: Final answer
   x = 7,096.18