Finding the Fourth Proportional to 7,111.38, 9,813.57 and 3,924.98

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.38 : 9,813.57 = 3,924.98 : x
2. Step 2: Convert to fraction form
   7,111.38/9,813.57 = 3,924.98/x
3. Step 3: Cross multiply
   7,111.38x = 9,813.57 × 3,924.98
4. Step 4: Simplify right side
   7,111.38x = 38,518,016.91
5. Step 5: Solve for x
   x = 38,518,016.91/7,111.38
6. Step 6: Final answer
   x = 5,416.39