Finding the Fourth Proportional to 30,956.74, 42,720.69 and 16,809.82

Step by Step Solution

1. Step 1: Write the proportion equation
   30,956.74 : 42,720.69 = 16,809.82 : x
2. Step 2: Convert to fraction form
   30,956.74/42,720.69 = 16,809.82/x
3. Step 3: Cross multiply
   30,956.74x = 42,720.69 × 16,809.82
4. Step 4: Simplify right side
   30,956.74x = 718,127,109.18
5. Step 5: Solve for x
   x = 718,127,109.18/30,956.74
6. Step 6: Final answer
   x = 23,197.76