Finding the Fourth Proportional to 12,689.90, 19,043.30 and 5,667.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,689.90 : 19,043.30 = 5,667.58 : x
2. Step 2: Convert to fraction form
   12,689.90/19,043.30 = 5,667.58/x
3. Step 3: Cross multiply
   12,689.90x = 19,043.30 × 5,667.58
4. Step 4: Simplify right side
   12,689.90x = 107,929,370.46
5. Step 5: Solve for x
   x = 107,929,370.46/12,689.90
6. Step 6: Final answer
   x = 8,505.14