Finding the Fourth Proportional to 30,680.81, 42,338.67 and 17,251.72

Step by Step Solution

1. Step 1: Write the proportion equation
   30,680.81 : 42,338.67 = 17,251.72 : x
2. Step 2: Convert to fraction form
   30,680.81/42,338.67 = 17,251.72/x
3. Step 3: Cross multiply
   30,680.81x = 42,338.67 × 17,251.72
4. Step 4: Simplify right side
   30,680.81x = 730,414,838.86
5. Step 5: Solve for x
   x = 730,414,838.86/30,680.81
6. Step 6: Final answer
   x = 23,806.90