Finding the Fourth Proportional to 30,826.55, 42,540.71 and 16,679.39

Step by Step Solution

1. Step 1: Write the proportion equation
   30,826.55 : 42,540.71 = 16,679.39 : x
2. Step 2: Convert to fraction form
   30,826.55/42,540.71 = 16,679.39/x
3. Step 3: Cross multiply
   30,826.55x = 42,540.71 × 16,679.39
4. Step 4: Simplify right side
   30,826.55x = 709,552,796.87
5. Step 5: Solve for x
   x = 709,552,796.87/30,826.55
6. Step 6: Final answer
   x = 23,017.59