Finding the Fourth Proportional to 8,759.69, 12,089.55 and 5,573.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,759.69 : 12,089.55 = 5,573.31 : x
2. Step 2: Convert to fraction form
   8,759.69/12,089.55 = 5,573.31/x
3. Step 3: Cross multiply
   8,759.69x = 12,089.55 × 5,573.31
4. Step 4: Simplify right side
   8,759.69x = 67,378,785.47
5. Step 5: Solve for x
   x = 67,378,785.47/8,759.69
6. Step 6: Final answer
   x = 7,691.91