Finding the Fourth Proportional to 30,960.42, 42,747.57 and 19,039.74

Step by Step Solution

1. Step 1: Write the proportion equation
   30,960.42 : 42,747.57 = 19,039.74 : x
2. Step 2: Convert to fraction form
   30,960.42/42,747.57 = 19,039.74/x
3. Step 3: Cross multiply
   30,960.42x = 42,747.57 × 19,039.74
4. Step 4: Simplify right side
   30,960.42x = 813,902,618.43
5. Step 5: Solve for x
   x = 813,902,618.43/30,960.42
6. Step 6: Final answer
   x = 26,288.49