Finding the Fourth Proportional to 30,968.33, 42,734.18 and 16,820.87

Step by Step Solution

1. Step 1: Write the proportion equation
   30,968.33 : 42,734.18 = 16,820.87 : x
2. Step 2: Convert to fraction form
   30,968.33/42,734.18 = 16,820.87/x
3. Step 3: Cross multiply
   30,968.33x = 42,734.18 × 16,820.87
4. Step 4: Simplify right side
   30,968.33x = 718,825,914.72
5. Step 5: Solve for x
   x = 718,825,914.72/30,968.33
6. Step 6: Final answer
   x = 23,211.65