Finding the Fourth Proportional to 9,995.72, 14,989.20 and 5,314.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,995.72 : 14,989.20 = 5,314.59 : x
2. Step 2: Convert to fraction form
   9,995.72/14,989.20 = 5,314.59/x
3. Step 3: Cross multiply
   9,995.72x = 14,989.20 × 5,314.59
4. Step 4: Simplify right side
   9,995.72x = 79,661,452.43
5. Step 5: Solve for x
   x = 79,661,452.43/9,995.72
6. Step 6: Final answer
   x = 7,969.56