Finding the Fourth Proportional to 7,111.30, 9,813.54 and 3,967.48

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.30 : 9,813.54 = 3,967.48 : x
2. Step 2: Convert to fraction form
   7,111.30/9,813.54 = 3,967.48/x
3. Step 3: Cross multiply
   7,111.30x = 9,813.54 × 3,967.48
4. Step 4: Simplify right side
   7,111.30x = 38,935,023.68
5. Step 5: Solve for x
   x = 38,935,023.68/7,111.30
6. Step 6: Final answer
   x = 5,475.09