Finding the Fourth Proportional to 19,993.31, 29,993.61 and 10,003.28

Step by Step Solution

1. Step 1: Write the proportion equation
   19,993.31 : 29,993.61 = 10,003.28 : x
2. Step 2: Convert to fraction form
   19,993.31/29,993.61 = 10,003.28/x
3. Step 3: Cross multiply
   19,993.31x = 29,993.61 × 10,003.28
4. Step 4: Simplify right side
   19,993.31x = 300,034,479.04
5. Step 5: Solve for x
   x = 300,034,479.04/19,993.31
6. Step 6: Final answer
   x = 15,006.74