Finding the Fourth Proportional to 30,636, 42,276.87 and 17,208.72

Step by Step Solution

1. Step 1: Write the proportion equation
   30,636 : 42,276.87 = 17,208.72 : x
2. Step 2: Convert to fraction form
   30,636/42,276.87 = 17,208.72/x
3. Step 3: Cross multiply
   30,636x = 42,276.87 × 17,208.72
4. Step 4: Simplify right side
   30,636x = 727,530,818.31
5. Step 5: Solve for x
   x = 727,530,818.31/30,636
6. Step 6: Final answer
   x = 23,747.58