Finding the Fourth Proportional to 19,996.61, 30,013.37 and 10,142.81

Step by Step Solution

1. Step 1: Write the proportion equation
   19,996.61 : 30,013.37 = 10,142.81 : x
2. Step 2: Convert to fraction form
   19,996.61/30,013.37 = 10,142.81/x
3. Step 3: Cross multiply
   19,996.61x = 30,013.37 × 10,142.81
4. Step 4: Simplify right side
   19,996.61x = 304,419,708.59
5. Step 5: Solve for x
   x = 304,419,708.59/19,996.61
6. Step 6: Final answer
   x = 15,223.57