Finding the Fourth Proportional to 7,111.18, 9,813.98 and 3,925.11

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.18 : 9,813.98 = 3,925.11 : x
2. Step 2: Convert to fraction form
   7,111.18/9,813.98 = 3,925.11/x
3. Step 3: Cross multiply
   7,111.18x = 9,813.98 × 3,925.11
4. Step 4: Simplify right side
   7,111.18x = 38,520,951.04
5. Step 5: Solve for x
   x = 38,520,951.04/7,111.18
6. Step 6: Final answer
   x = 5,416.96