Finding the Fourth Proportional to 12,815, 17,683.27 and 7,436.19

Step by Step Solution

1. Step 1: Write the proportion equation
   12,815 : 17,683.27 = 7,436.19 : x
2. Step 2: Convert to fraction form
   12,815/17,683.27 = 7,436.19/x
3. Step 3: Cross multiply
   12,815x = 17,683.27 × 7,436.19
4. Step 4: Simplify right side
   12,815x = 131,496,155.54
5. Step 5: Solve for x
   x = 131,496,155.54/12,815
6. Step 6: Final answer
   x = 10,261.11