Finding the Fourth Proportional to 7,111.69, 9,813.98 and 3,924.86

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.69 : 9,813.98 = 3,924.86 : x
2. Step 2: Convert to fraction form
   7,111.69/9,813.98 = 3,924.86/x
3. Step 3: Cross multiply
   7,111.69x = 9,813.98 × 3,924.86
4. Step 4: Simplify right side
   7,111.69x = 38,518,458.29
5. Step 5: Solve for x
   x = 38,518,458.29/7,111.69
6. Step 6: Final answer
   x = 5,416.22