Finding the Fourth Proportional to 30,819.30, 42,530.49 and 16,672.02

Step by Step Solution

1. Step 1: Write the proportion equation
   30,819.30 : 42,530.49 = 16,672.02 : x
2. Step 2: Convert to fraction form
   30,819.30/42,530.49 = 16,672.02/x
3. Step 3: Cross multiply
   30,819.30x = 42,530.49 × 16,672.02
4. Step 4: Simplify right side
   30,819.30x = 709,069,179.89
5. Step 5: Solve for x
   x = 709,069,179.89/30,819.30
6. Step 6: Final answer
   x = 23,007.31