Finding the Fourth Proportional to 31,074.15, 42,891.72 and 22,147.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,074.15 : 42,891.72 = 22,147.56 : x
2. Step 2: Convert to fraction form
   31,074.15/42,891.72 = 22,147.56/x
3. Step 3: Cross multiply
   31,074.15x = 42,891.72 × 22,147.56
4. Step 4: Simplify right side
   31,074.15x = 949,946,942.20
5. Step 5: Solve for x
   x = 949,946,942.20/31,074.15
6. Step 6: Final answer
   x = 30,570.33