Finding the Fourth Proportional to 12,690.32, 19,039.98 and 5,669.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,690.32 : 19,039.98 = 5,669.69 : x
2. Step 2: Convert to fraction form
   12,690.32/19,039.98 = 5,669.69/x
3. Step 3: Cross multiply
   12,690.32x = 19,039.98 × 5,669.69
4. Step 4: Simplify right side
   12,690.32x = 107,950,689.01
5. Step 5: Solve for x
   x = 107,950,689.01/12,690.32
6. Step 6: Final answer
   x = 8,506.54