Finding the Fourth Proportional to 12,436.40, 17,158.56 and 7,396.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,436.40 : 17,158.56 = 7,396.58 : x
2. Step 2: Convert to fraction form
   12,436.40/17,158.56 = 7,396.58/x
3. Step 3: Cross multiply
   12,436.40x = 17,158.56 × 7,396.58
4. Step 4: Simplify right side
   12,436.40x = 126,914,661.72
5. Step 5: Solve for x
   x = 126,914,661.72/12,436.40
6. Step 6: Final answer
   x = 10,205.10