Finding the Fourth Proportional to 12,868.84, 17,758.20 and 12,491.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,868.84 : 17,758.20 = 12,491.38 : x
2. Step 2: Convert to fraction form
   12,868.84/17,758.20 = 12,491.38/x
3. Step 3: Cross multiply
   12,868.84x = 17,758.20 × 12,491.38
4. Step 4: Simplify right side
   12,868.84x = 221,824,424.32
5. Step 5: Solve for x
   x = 221,824,424.32/12,868.84
6. Step 6: Final answer
   x = 17,237.33