Finding the Fourth Proportional to 30,945.34, 42,682.71 and 19,015.39

Step by Step Solution

1. Step 1: Write the proportion equation
   30,945.34 : 42,682.71 = 19,015.39 : x
2. Step 2: Convert to fraction form
   30,945.34/42,682.71 = 19,015.39/x
3. Step 3: Cross multiply
   30,945.34x = 42,682.71 × 19,015.39
4. Step 4: Simplify right side
   30,945.34x = 811,628,376.91
5. Step 5: Solve for x
   x = 811,628,376.91/30,945.34
6. Step 6: Final answer
   x = 26,227.81