Finding the Fourth Proportional to 12,689.94, 19,038.80 and 5,675.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,689.94 : 19,038.80 = 5,675.86 : x
2. Step 2: Convert to fraction form
   12,689.94/19,038.80 = 5,675.86/x
3. Step 3: Cross multiply
   12,689.94x = 19,038.80 × 5,675.86
4. Step 4: Simplify right side
   12,689.94x = 108,061,529.96
5. Step 5: Solve for x
   x = 108,061,529.96/12,689.94
6. Step 6: Final answer
   x = 8,515.53