Finding the Fourth Proportional to 19,993.96, 30,009.32 and 10,140.31

Step by Step Solution

1. Step 1: Write the proportion equation
   19,993.96 : 30,009.32 = 10,140.31 : x
2. Step 2: Convert to fraction form
   19,993.96/30,009.32 = 10,140.31/x
3. Step 3: Cross multiply
   19,993.96x = 30,009.32 × 10,140.31
4. Step 4: Simplify right side
   19,993.96x = 304,303,807.69
5. Step 5: Solve for x
   x = 304,303,807.69/19,993.96
6. Step 6: Final answer
   x = 15,219.79