Finding the Fourth Proportional to 30,967.76, 42,734.22 and 16,820.24

Step by Step Solution

1. Step 1: Write the proportion equation
   30,967.76 : 42,734.22 = 16,820.24 : x
2. Step 2: Convert to fraction form
   30,967.76/42,734.22 = 16,820.24/x
3. Step 3: Cross multiply
   30,967.76x = 42,734.22 × 16,820.24
4. Step 4: Simplify right side
   30,967.76x = 718,799,836.61
5. Step 5: Solve for x
   x = 718,799,836.61/30,967.76
6. Step 6: Final answer
   x = 23,211.23