Finding the Fourth Proportional to 9,400.82, 12,943.60 and 7,981.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,400.82 : 12,943.60 = 7,981.54 : x
2. Step 2: Convert to fraction form
   9,400.82/12,943.60 = 7,981.54/x
3. Step 3: Cross multiply
   9,400.82x = 12,943.60 × 7,981.54
4. Step 4: Simplify right side
   9,400.82x = 103,309,861.14
5. Step 5: Solve for x
   x = 103,309,861.14/9,400.82
6. Step 6: Final answer
   x = 10,989.45