Finding the Fourth Proportional to 23,031.69, 31,783.77 and 12,960.69

Step by Step Solution

1. Step 1: Write the proportion equation
   23,031.69 : 31,783.77 = 12,960.69 : x
2. Step 2: Convert to fraction form
   23,031.69/31,783.77 = 12,960.69/x
3. Step 3: Cross multiply
   23,031.69x = 31,783.77 × 12,960.69
4. Step 4: Simplify right side
   23,031.69x = 411,939,590.00
5. Step 5: Solve for x
   x = 411,939,590.00/23,031.69
6. Step 6: Final answer
   x = 17,885.77