Finding the Fourth Proportional to 30,719.98, 42,393.54 and 17,981.92

Step by Step Solution

1. Step 1: Write the proportion equation
   30,719.98 : 42,393.54 = 17,981.92 : x
2. Step 2: Convert to fraction form
   30,719.98/42,393.54 = 17,981.92/x
3. Step 3: Cross multiply
   30,719.98x = 42,393.54 × 17,981.92
4. Step 4: Simplify right side
   30,719.98x = 762,317,244.80
5. Step 5: Solve for x
   x = 762,317,244.80/30,719.98
6. Step 6: Final answer
   x = 24,815.03