Finding the Fourth Proportional to 30,819.32, 42,530.64 and 16,672.18

Step by Step Solution

1. Step 1: Write the proportion equation
   30,819.32 : 42,530.64 = 16,672.18 : x
2. Step 2: Convert to fraction form
   30,819.32/42,530.64 = 16,672.18/x
3. Step 3: Cross multiply
   30,819.32x = 42,530.64 × 16,672.18
4. Step 4: Simplify right side
   30,819.32x = 709,078,272.94
5. Step 5: Solve for x
   x = 709,078,272.94/30,819.32
6. Step 6: Final answer
   x = 23,007.59