Finding the Fourth Proportional to 7,111.38, 9,813.92 and 3,967.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.38 : 9,813.92 = 3,967.50 : x
2. Step 2: Convert to fraction form
   7,111.38/9,813.92 = 3,967.50/x
3. Step 3: Cross multiply
   7,111.38x = 9,813.92 × 3,967.50
4. Step 4: Simplify right side
   7,111.38x = 38,936,707.76
5. Step 5: Solve for x
   x = 38,936,707.76/7,111.38
6. Step 6: Final answer
   x = 5,475.27