Finding the Fourth Proportional to 11,952.21, 17,908.38 and 8,436.45

Step by Step Solution

1. Step 1: Write the proportion equation
   11,952.21 : 17,908.38 = 8,436.45 : x
2. Step 2: Convert to fraction form
   11,952.21/17,908.38 = 8,436.45/x
3. Step 3: Cross multiply
   11,952.21x = 17,908.38 × 8,436.45
4. Step 4: Simplify right side
   11,952.21x = 151,083,152.45
5. Step 5: Solve for x
   x = 151,083,152.45/11,952.21
6. Step 6: Final answer
   x = 12,640.60