Finding the Fourth Proportional to 12,930.72, 17,825.04 and 10,131.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,930.72 : 17,825.04 = 10,131.36 : x
2. Step 2: Convert to fraction form
   12,930.72/17,825.04 = 10,131.36/x
3. Step 3: Cross multiply
   12,930.72x = 17,825.04 × 10,131.36
4. Step 4: Simplify right side
   12,930.72x = 180,591,897.25
5. Step 5: Solve for x
   x = 180,591,897.25/12,930.72
6. Step 6: Final answer
   x = 13,966.11