Finding the Fourth Proportional to 12,689.69, 19,038.43 and 5,675.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,689.69 : 19,038.43 = 5,675.61 : x
2. Step 2: Convert to fraction form
   12,689.69/19,038.43 = 5,675.61/x
3. Step 3: Cross multiply
   12,689.69x = 19,038.43 × 5,675.61
4. Step 4: Simplify right side
   12,689.69x = 108,054,608.50
5. Step 5: Solve for x
   x = 108,054,608.50/12,689.69
6. Step 6: Final answer
   x = 8,515.15