Finding the Fourth Proportional to 9,969.78, 13,756.43 and 5,990.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,969.78 : 13,756.43 = 5,990.96 : x
2. Step 2: Convert to fraction form
   9,969.78/13,756.43 = 5,990.96/x
3. Step 3: Cross multiply
   9,969.78x = 13,756.43 × 5,990.96
4. Step 4: Simplify right side
   9,969.78x = 82,414,271.24
5. Step 5: Solve for x
   x = 82,414,271.24/9,969.78
6. Step 6: Final answer
   x = 8,266.41