Finding the Fourth Proportional to 16,749.69, 25,127.72 and 7,985.28

Step by Step Solution

1. Step 1: Write the proportion equation
   16,749.69 : 25,127.72 = 7,985.28 : x
2. Step 2: Convert to fraction form
   16,749.69/25,127.72 = 7,985.28/x
3. Step 3: Cross multiply
   16,749.69x = 25,127.72 × 7,985.28
4. Step 4: Simplify right side
   16,749.69x = 200,651,964.21
5. Step 5: Solve for x
   x = 200,651,964.21/16,749.69
6. Step 6: Final answer
   x = 11,979.45