Finding the Fourth Proportional to 23,000, 31,739.72 and 12,930.12

Step by Step Solution

1. Step 1: Write the proportion equation
   23,000 : 31,739.72 = 12,930.12 : x
2. Step 2: Convert to fraction form
   23,000/31,739.72 = 12,930.12/x
3. Step 3: Cross multiply
   23,000x = 31,739.72 × 12,930.12
4. Step 4: Simplify right side
   23,000x = 410,398,388.37
5. Step 5: Solve for x
   x = 410,398,388.37/23,000
6. Step 6: Final answer
   x = 17,843.41