Finding the Fourth Proportional to 30,967.02, 42,734.61 and 16,820.10

Step by Step Solution

1. Step 1: Write the proportion equation
   30,967.02 : 42,734.61 = 16,820.10 : x
2. Step 2: Convert to fraction form
   30,967.02/42,734.61 = 16,820.10/x
3. Step 3: Cross multiply
   30,967.02x = 42,734.61 × 16,820.10
4. Step 4: Simplify right side
   30,967.02x = 718,800,413.66
5. Step 5: Solve for x
   x = 718,800,413.66/30,967.02
6. Step 6: Final answer
   x = 23,211.80