Finding the Fourth Proportional to 11,689, 17,533.34 and 4,290.56

Step by Step Solution

1. Step 1: Write the proportion equation
   11,689 : 17,533.34 = 4,290.56 : x
2. Step 2: Convert to fraction form
   11,689/17,533.34 = 4,290.56/x
3. Step 3: Cross multiply
   11,689x = 17,533.34 × 4,290.56
4. Step 4: Simplify right side
   11,689x = 75,227,847.27
5. Step 5: Solve for x
   x = 75,227,847.27/11,689
6. Step 6: Final answer
   x = 6,435.78