Finding the Fourth Proportional to 11,387.69, 17,089.25 and 3,992.25

Step by Step Solution

1. Step 1: Write the proportion equation
   11,387.69 : 17,089.25 = 3,992.25 : x
2. Step 2: Convert to fraction form
   11,387.69/17,089.25 = 3,992.25/x
3. Step 3: Cross multiply
   11,387.69x = 17,089.25 × 3,992.25
4. Step 4: Simplify right side
   11,387.69x = 68,224,538.35
5. Step 5: Solve for x
   x = 68,224,538.35/11,387.69
6. Step 6: Final answer
   x = 5,991.08