Finding the Fourth Proportional to 12,443.28, 17,174.52 and 7,907.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.28 : 17,174.52 = 7,907.28 : x
2. Step 2: Convert to fraction form
   12,443.28/17,174.52 = 7,907.28/x
3. Step 3: Cross multiply
   12,443.28x = 17,174.52 × 7,907.28
4. Step 4: Simplify right side
   12,443.28x = 135,803,738.51
5. Step 5: Solve for x
   x = 135,803,738.51/12,443.28
6. Step 6: Final answer
   x = 10,913.82