Finding the Fourth Proportional to 12,689.82, 19,039.23 and 5,669.19

Step by Step Solution

1. Step 1: Write the proportion equation
   12,689.82 : 19,039.23 = 5,669.19 : x
2. Step 2: Convert to fraction form
   12,689.82/19,039.23 = 5,669.19/x
3. Step 3: Cross multiply
   12,689.82x = 19,039.23 × 5,669.19
4. Step 4: Simplify right side
   12,689.82x = 107,937,012.32
5. Step 5: Solve for x
   x = 107,937,012.32/12,689.82
6. Step 6: Final answer
   x = 8,505.80