Finding the Fourth Proportional to 30,636.81, 42,276.69 and 17,209.30

Step by Step Solution

1. Step 1: Write the proportion equation
   30,636.81 : 42,276.69 = 17,209.30 : x
2. Step 2: Convert to fraction form
   30,636.81/42,276.69 = 17,209.30/x
3. Step 3: Cross multiply
   30,636.81x = 42,276.69 × 17,209.30
4. Step 4: Simplify right side
   30,636.81x = 727,552,241.22
5. Step 5: Solve for x
   x = 727,552,241.22/30,636.81
6. Step 6: Final answer
   x = 23,747.65