Finding the Fourth Proportional to 30,558.42, 42,170.71 and 16,947.42

Step by Step Solution

1. Step 1: Write the proportion equation
   30,558.42 : 42,170.71 = 16,947.42 : x
2. Step 2: Convert to fraction form
   30,558.42/42,170.71 = 16,947.42/x
3. Step 3: Cross multiply
   30,558.42x = 42,170.71 × 16,947.42
4. Step 4: Simplify right side
   30,558.42x = 714,684,734.07
5. Step 5: Solve for x
   x = 714,684,734.07/30,558.42
6. Step 6: Final answer
   x = 23,387.49