Finding the Fourth Proportional to 8,238.12, 12,346.23 and 7,137.36

Step by Step Solution

1. Step 1: Write the proportion equation
   8,238.12 : 12,346.23 = 7,137.36 : x
2. Step 2: Convert to fraction form
   8,238.12/12,346.23 = 7,137.36/x
3. Step 3: Cross multiply
   8,238.12x = 12,346.23 × 7,137.36
4. Step 4: Simplify right side
   8,238.12x = 88,119,488.15
5. Step 5: Solve for x
   x = 88,119,488.15/8,238.12
6. Step 6: Final answer
   x = 10,696.55