Finding the Fourth Proportional to 30,806.88, 42,513.28 and 16,659.52

Step by Step Solution

1. Step 1: Write the proportion equation
   30,806.88 : 42,513.28 = 16,659.52 : x
2. Step 2: Convert to fraction form
   30,806.88/42,513.28 = 16,659.52/x
3. Step 3: Cross multiply
   30,806.88x = 42,513.28 × 16,659.52
4. Step 4: Simplify right side
   30,806.88x = 708,250,838.43
5. Step 5: Solve for x
   x = 708,250,838.43/30,806.88
6. Step 6: Final answer
   x = 22,990.02