Finding the Fourth Proportional to 12,945.88, 17,858.10 and 8,969.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,945.88 : 17,858.10 = 8,969.32 : x
2. Step 2: Convert to fraction form
   12,945.88/17,858.10 = 8,969.32/x
3. Step 3: Cross multiply
   12,945.88x = 17,858.10 × 8,969.32
4. Step 4: Simplify right side
   12,945.88x = 160,175,013.49
5. Step 5: Solve for x
   x = 160,175,013.49/12,945.88
6. Step 6: Final answer
   x = 12,372.66