Finding the Fourth Proportional to 30,967.16, 42,734.69 and 16,820.00

Step by Step Solution

1. Step 1: Write the proportion equation
   30,967.16 : 42,734.69 = 16,820.00 : x
2. Step 2: Convert to fraction form
   30,967.16/42,734.69 = 16,820.00/x
3. Step 3: Cross multiply
   30,967.16x = 42,734.69 × 16,820.00
4. Step 4: Simplify right side
   30,967.16x = 718,797,651.74
5. Step 5: Solve for x
   x = 718,797,651.74/30,967.16
6. Step 6: Final answer
   x = 23,211.61