Finding the Fourth Proportional to 30,572.72, 42,170.94 and 22,087.31

Step by Step Solution

1. Step 1: Write the proportion equation
   30,572.72 : 42,170.94 = 22,087.31 : x
2. Step 2: Convert to fraction form
   30,572.72/42,170.94 = 22,087.31/x
3. Step 3: Cross multiply
   30,572.72x = 42,170.94 × 22,087.31
4. Step 4: Simplify right side
   30,572.72x = 931,442,514.33
5. Step 5: Solve for x
   x = 931,442,514.33/30,572.72
6. Step 6: Final answer
   x = 30,466.46