Finding the Fourth Proportional to 12,888.30, 17,786.30 and 12,297.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,888.30 : 17,786.30 = 12,297.82 : x
2. Step 2: Convert to fraction form
   12,888.30/17,786.30 = 12,297.82/x
3. Step 3: Cross multiply
   12,888.30x = 17,786.30 × 12,297.82
4. Step 4: Simplify right side
   12,888.30x = 218,732,715.87
5. Step 5: Solve for x
   x = 218,732,715.87/12,888.30
6. Step 6: Final answer
   x = 16,971.42