Finding the Fourth Proportional to 7,111.50, 9,813.15 and 3,967.14

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.50 : 9,813.15 = 3,967.14 : x
2. Step 2: Convert to fraction form
   7,111.50/9,813.15 = 3,967.14/x
3. Step 3: Cross multiply
   7,111.50x = 9,813.15 × 3,967.14
4. Step 4: Simplify right side
   7,111.50x = 38,930,139.89
5. Step 5: Solve for x
   x = 38,930,139.89/7,111.50
6. Step 6: Final answer
   x = 5,474.25