Finding the Fourth Proportional to 30,647.20, 42,279.24 and 19,308.82

Step by Step Solution

1. Step 1: Write the proportion equation
   30,647.20 : 42,279.24 = 19,308.82 : x
2. Step 2: Convert to fraction form
   30,647.20/42,279.24 = 19,308.82/x
3. Step 3: Cross multiply
   30,647.20x = 42,279.24 × 19,308.82
4. Step 4: Simplify right side
   30,647.20x = 816,362,234.90
5. Step 5: Solve for x
   x = 816,362,234.90/30,647.20
6. Step 6: Final answer
   x = 26,637.42