Finding the Fourth Proportional to 12,955.09, 17,885.46 and 8,712.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,955.09 : 17,885.46 = 8,712.31 : x
2. Step 2: Convert to fraction form
   12,955.09/17,885.46 = 8,712.31/x
3. Step 3: Cross multiply
   12,955.09x = 17,885.46 × 8,712.31
4. Step 4: Simplify right side
   12,955.09x = 155,823,672.01
5. Step 5: Solve for x
   x = 155,823,672.01/12,955.09
6. Step 6: Final answer
   x = 12,027.99