Finding the Fourth Proportional to 12,444, 17,173.56 and 7,139.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,444 : 17,173.56 = 7,139.04 : x
2. Step 2: Convert to fraction form
   12,444/17,173.56 = 7,139.04/x
3. Step 3: Cross multiply
   12,444x = 17,173.56 × 7,139.04
4. Step 4: Simplify right side
   12,444x = 122,602,731.78
5. Step 5: Solve for x
   x = 122,602,731.78/12,444
6. Step 6: Final answer
   x = 9,852.36