Finding the Fourth Proportional to 11,811.69, 17,729.89 and 5,242.52

Step by Step Solution

1. Step 1: Write the proportion equation
   11,811.69 : 17,729.89 = 5,242.52 : x
2. Step 2: Convert to fraction form
   11,811.69/17,729.89 = 5,242.52/x
3. Step 3: Cross multiply
   11,811.69x = 17,729.89 × 5,242.52
4. Step 4: Simplify right side
   11,811.69x = 92,949,334.14
5. Step 5: Solve for x
   x = 92,949,334.14/11,811.69
6. Step 6: Final answer
   x = 7,869.27