Finding the Fourth Proportional to 8,962.09, 13,403.83 and 7,981.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,962.09 : 13,403.83 = 7,981.82 : x
2. Step 2: Convert to fraction form
   8,962.09/13,403.83 = 7,981.82/x
3. Step 3: Cross multiply
   8,962.09x = 13,403.83 × 7,981.82
4. Step 4: Simplify right side
   8,962.09x = 106,986,958.37
5. Step 5: Solve for x
   x = 106,986,958.37/8,962.09
6. Step 6: Final answer
   x = 11,937.72