Finding the Fourth Proportional to 30,648.57, 42,282.77 and 19,315.05

Step by Step Solution

1. Step 1: Write the proportion equation
   30,648.57 : 42,282.77 = 19,315.05 : x
2. Step 2: Convert to fraction form
   30,648.57/42,282.77 = 19,315.05/x
3. Step 3: Cross multiply
   30,648.57x = 42,282.77 × 19,315.05
4. Step 4: Simplify right side
   30,648.57x = 816,693,816.69
5. Step 5: Solve for x
   x = 816,693,816.69/30,648.57
6. Step 6: Final answer
   x = 26,647.04