Finding the Fourth Proportional to 7,443.96, 11,090.22 and 7,091.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,443.96 : 11,090.22 = 7,091.31 : x
2. Step 2: Convert to fraction form
   7,443.96/11,090.22 = 7,091.31/x
3. Step 3: Cross multiply
   7,443.96x = 11,090.22 × 7,091.31
4. Step 4: Simplify right side
   7,443.96x = 78,644,187.99
5. Step 5: Solve for x
   x = 78,644,187.99/7,443.96
6. Step 6: Final answer
   x = 10,564.83