Finding the Fourth Proportional to 12,589.66, 17,367.89 and 10,075.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,589.66 : 17,367.89 = 10,075.31 : x
2. Step 2: Convert to fraction form
   12,589.66/17,367.89 = 10,075.31/x
3. Step 3: Cross multiply
   12,589.66x = 17,367.89 × 10,075.31
4. Step 4: Simplify right side
   12,589.66x = 174,986,875.80
5. Step 5: Solve for x
   x = 174,986,875.80/12,589.66
6. Step 6: Final answer
   x = 13,899.25