Finding the Fourth Proportional to 17,687.67, 24,412.47 and 10,139.07

Step by Step Solution

1. Step 1: Write the proportion equation
   17,687.67 : 24,412.47 = 10,139.07 : x
2. Step 2: Convert to fraction form
   17,687.67/24,412.47 = 10,139.07/x
3. Step 3: Cross multiply
   17,687.67x = 24,412.47 × 10,139.07
4. Step 4: Simplify right side
   17,687.67x = 247,519,852.76
5. Step 5: Solve for x
   x = 247,519,852.76/17,687.67
6. Step 6: Final answer
   x = 13,993.92