Finding the Fourth Proportional to 12,689.49, 17,494.72 and 10,412.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,689.49 : 17,494.72 = 10,412.49 : x
2. Step 2: Convert to fraction form
   12,689.49/17,494.72 = 10,412.49/x
3. Step 3: Cross multiply
   12,689.49x = 17,494.72 × 10,412.49
4. Step 4: Simplify right side
   12,689.49x = 182,163,597.05
5. Step 5: Solve for x
   x = 182,163,597.05/12,689.49
6. Step 6: Final answer
   x = 14,355.47