Finding the Fourth Proportional to 12,786.59, 17,645.46 and 7,480.37

Step by Step Solution

1. Step 1: Write the proportion equation
   12,786.59 : 17,645.46 = 7,480.37 : x
2. Step 2: Convert to fraction form
   12,786.59/17,645.46 = 7,480.37/x
3. Step 3: Cross multiply
   12,786.59x = 17,645.46 × 7,480.37
4. Step 4: Simplify right side
   12,786.59x = 131,994,569.62
5. Step 5: Solve for x
   x = 131,994,569.62/12,786.59
6. Step 6: Final answer
   x = 10,322.89