Finding the Fourth Proportional to 30,570.03, 42,168.72 and 19,221.54

Step by Step Solution

1. Step 1: Write the proportion equation
   30,570.03 : 42,168.72 = 19,221.54 : x
2. Step 2: Convert to fraction form
   30,570.03/42,168.72 = 19,221.54/x
3. Step 3: Cross multiply
   30,570.03x = 42,168.72 × 19,221.54
4. Step 4: Simplify right side
   30,570.03x = 810,547,738.23
5. Step 5: Solve for x
   x = 810,547,738.23/30,570.03
6. Step 6: Final answer
   x = 26,514.46