Finding the Fourth Proportional to 9,969.80, 13,759.56 and 5,777.24

Step by Step Solution

1. Step 1: Write the proportion equation
   9,969.80 : 13,759.56 = 5,777.24 : x
2. Step 2: Convert to fraction form
   9,969.80/13,759.56 = 5,777.24/x
3. Step 3: Cross multiply
   9,969.80x = 13,759.56 × 5,777.24
4. Step 4: Simplify right side
   9,969.80x = 79,492,280.41
5. Step 5: Solve for x
   x = 79,492,280.41/9,969.80
6. Step 6: Final answer
   x = 7,973.31