Finding the Fourth Proportional to 30,647.57, 42,281.39 and 19,314.05

Step by Step Solution

1. Step 1: Write the proportion equation
   30,647.57 : 42,281.39 = 19,314.05 : x
2. Step 2: Convert to fraction form
   30,647.57/42,281.39 = 19,314.05/x
3. Step 3: Cross multiply
   30,647.57x = 42,281.39 × 19,314.05
4. Step 4: Simplify right side
   30,647.57x = 816,624,717.41
5. Step 5: Solve for x
   x = 816,624,717.41/30,647.57
6. Step 6: Final answer
   x = 26,645.66