Finding the Fourth Proportional to 30,540.24, 42,166.17 and 19,788.30

Step by Step Solution

1. Step 1: Write the proportion equation
   30,540.24 : 42,166.17 = 19,788.30 : x
2. Step 2: Convert to fraction form
   30,540.24/42,166.17 = 19,788.30/x
3. Step 3: Cross multiply
   30,540.24x = 42,166.17 × 19,788.30
4. Step 4: Simplify right side
   30,540.24x = 834,396,821.81
5. Step 5: Solve for x
   x = 834,396,821.81/30,540.24
6. Step 6: Final answer
   x = 27,321.23