Finding the Fourth Proportional to 30,958.56, 42,722.43 and 16,811.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,958.56 : 42,722.43 = 16,811.50 : x
2. Step 2: Convert to fraction form
   30,958.56/42,722.43 = 16,811.50/x
3. Step 3: Cross multiply
   30,958.56x = 42,722.43 × 16,811.50
4. Step 4: Simplify right side
   30,958.56x = 718,228,131.95
5. Step 5: Solve for x
   x = 718,228,131.95/30,958.56
6. Step 6: Final answer
   x = 23,199.66