Finding the Fourth Proportional to 23,031.50, 31,783.60 and 12,960.11

Step by Step Solution

1. Step 1: Write the proportion equation
   23,031.50 : 31,783.60 = 12,960.11 : x
2. Step 2: Convert to fraction form
   23,031.50/31,783.60 = 12,960.11/x
3. Step 3: Cross multiply
   23,031.50x = 31,783.60 × 12,960.11
4. Step 4: Simplify right side
   23,031.50x = 411,918,793.28
5. Step 5: Solve for x
   x = 411,918,793.28/23,031.50
6. Step 6: Final answer
   x = 17,885.02