Finding the Fourth Proportional to 21,290.01, 31,938.89 and 7,249.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,290.01 : 31,938.89 = 7,249.32 : x
2. Step 2: Convert to fraction form
   21,290.01/31,938.89 = 7,249.32/x
3. Step 3: Cross multiply
   21,290.01x = 31,938.89 × 7,249.32
4. Step 4: Simplify right side
   21,290.01x = 231,535,234.05
5. Step 5: Solve for x
   x = 231,535,234.05/21,290.01
6. Step 6: Final answer
   x = 10,875.30