Finding the Fourth Proportional to 30,826.32, 42,540.42 and 16,679.28

Step by Step Solution

1. Step 1: Write the proportion equation
   30,826.32 : 42,540.42 = 16,679.28 : x
2. Step 2: Convert to fraction form
   30,826.32/42,540.42 = 16,679.28/x
3. Step 3: Cross multiply
   30,826.32x = 42,540.42 × 16,679.28
4. Step 4: Simplify right side
   30,826.32x = 709,543,576.50
5. Step 5: Solve for x
   x = 709,543,576.50/30,826.32
6. Step 6: Final answer
   x = 23,017.46