Finding the Fourth Proportional to 13,116.69, 17,974.89 and 11,855.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,116.69 : 17,974.89 = 11,855.52 : x
2. Step 2: Convert to fraction form
   13,116.69/17,974.89 = 11,855.52/x
3. Step 3: Cross multiply
   13,116.69x = 17,974.89 × 11,855.52
4. Step 4: Simplify right side
   13,116.69x = 213,101,667.89
5. Step 5: Solve for x
   x = 213,101,667.89/13,116.69
6. Step 6: Final answer
   x = 16,246.60