Finding the Fourth Proportional to 31,180.24, 43,064.61 and 22,720.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,180.24 : 43,064.61 = 22,720.20 : x
2. Step 2: Convert to fraction form
   31,180.24/43,064.61 = 22,720.20/x
3. Step 3: Cross multiply
   31,180.24x = 43,064.61 × 22,720.20
4. Step 4: Simplify right side
   31,180.24x = 978,436,433.23
5. Step 5: Solve for x
   x = 978,436,433.23/31,180.24
6. Step 6: Final answer
   x = 31,380.01