Finding the Fourth Proportional to 21,250.68, 31,879.89 and 7,019.97

Step by Step Solution

1. Step 1: Write the proportion equation
   21,250.68 : 31,879.89 = 7,019.97 : x
2. Step 2: Convert to fraction form
   21,250.68/31,879.89 = 7,019.97/x
3. Step 3: Cross multiply
   21,250.68x = 31,879.89 × 7,019.97
4. Step 4: Simplify right side
   21,250.68x = 223,795,871.40
5. Step 5: Solve for x
   x = 223,795,871.40/21,250.68
6. Step 6: Final answer
   x = 10,531.23