Finding the Fourth Proportional to 30,967.74, 42,735.56 and 16,820.28

Step by Step Solution

1. Step 1: Write the proportion equation
   30,967.74 : 42,735.56 = 16,820.28 : x
2. Step 2: Convert to fraction form
   30,967.74/42,735.56 = 16,820.28/x
3. Step 3: Cross multiply
   30,967.74x = 42,735.56 × 16,820.28
4. Step 4: Simplify right side
   30,967.74x = 718,824,085.16
5. Step 5: Solve for x
   x = 718,824,085.16/30,967.74
6. Step 6: Final answer
   x = 23,212.03