Finding the Fourth Proportional to 30,964.72, 42,731.16 and 16,817.56

Step by Step Solution

1. Step 1: Write the proportion equation
   30,964.72 : 42,731.16 = 16,817.56 : x
2. Step 2: Convert to fraction form
   30,964.72/42,731.16 = 16,817.56/x
3. Step 3: Cross multiply
   30,964.72x = 42,731.16 × 16,817.56
4. Step 4: Simplify right side
   30,964.72x = 718,633,847.17
5. Step 5: Solve for x
   x = 718,633,847.17/30,964.72
6. Step 6: Final answer
   x = 23,208.15