Finding the Fourth Proportional to 39,847, 54,988.81 and 21,942.05

Step by Step Solution

1. Step 1: Write the proportion equation
   39,847 : 54,988.81 = 21,942.05 : x
2. Step 2: Convert to fraction form
   39,847/54,988.81 = 21,942.05/x
3. Step 3: Cross multiply
   39,847x = 54,988.81 × 21,942.05
4. Step 4: Simplify right side
   39,847x = 1,206,567,108.75
5. Step 5: Solve for x
   x = 1,206,567,108.75/39,847
6. Step 6: Final answer
   x = 30,280.00