Finding the Fourth Proportional to 9,969.72, 13,756.48 and 5,991.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,969.72 : 13,756.48 = 5,991.72 : x
2. Step 2: Convert to fraction form
   9,969.72/13,756.48 = 5,991.72/x
3. Step 3: Cross multiply
   9,969.72x = 13,756.48 × 5,991.72
4. Step 4: Simplify right side
   9,969.72x = 82,424,976.35
5. Step 5: Solve for x
   x = 82,424,976.35/9,969.72
6. Step 6: Final answer
   x = 8,267.53