Finding the Fourth Proportional to 9,961.97, 13,745.52 and 7,571.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,961.97 : 13,745.52 = 7,571.31 : x
2. Step 2: Convert to fraction form
   9,961.97/13,745.52 = 7,571.31/x
3. Step 3: Cross multiply
   9,961.97x = 13,745.52 × 7,571.31
4. Step 4: Simplify right side
   9,961.97x = 104,071,620.77
5. Step 5: Solve for x
   x = 104,071,620.77/9,961.97
6. Step 6: Final answer
   x = 10,446.89