Finding the Fourth Proportional to 11,387.69, 17,083.55 and 3,889.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,387.69 : 17,083.55 = 3,889.50 : x
2. Step 2: Convert to fraction form
   11,387.69/17,083.55 = 3,889.50/x
3. Step 3: Cross multiply
   11,387.69x = 17,083.55 × 3,889.50
4. Step 4: Simplify right side
   11,387.69x = 66,446,362.86
5. Step 5: Solve for x
   x = 66,446,362.86/11,387.69
6. Step 6: Final answer
   x = 5,834.93