Finding the Fourth Proportional to 20,371.83, 30,560.78 and 7,223.10

Step by Step Solution

1. Step 1: Write the proportion equation
   20,371.83 : 30,560.78 = 7,223.10 : x
2. Step 2: Convert to fraction form
   20,371.83/30,560.78 = 7,223.10/x
3. Step 3: Cross multiply
   20,371.83x = 30,560.78 × 7,223.10
4. Step 4: Simplify right side
   20,371.83x = 220,743,570.02
5. Step 5: Solve for x
   x = 220,743,570.02/20,371.83
6. Step 6: Final answer
   x = 10,835.73