Finding the Fourth Proportional to 31,282.20, 43,176.24 and 20,672.82

Step by Step Solution

1. Step 1: Write the proportion equation
   31,282.20 : 43,176.24 = 20,672.82 : x
2. Step 2: Convert to fraction form
   31,282.20/43,176.24 = 20,672.82/x
3. Step 3: Cross multiply
   31,282.20x = 43,176.24 × 20,672.82
4. Step 4: Simplify right side
   31,282.20x = 892,574,637.80
5. Step 5: Solve for x
   x = 892,574,637.80/31,282.20
6. Step 6: Final answer
   x = 28,532.99