Finding the Fourth Proportional to 10,209.61, 15,304.69 and 3,279.25

Step by Step Solution

1. Step 1: Write the proportion equation
   10,209.61 : 15,304.69 = 3,279.25 : x
2. Step 2: Convert to fraction form
   10,209.61/15,304.69 = 3,279.25/x
3. Step 3: Cross multiply
   10,209.61x = 15,304.69 × 3,279.25
4. Step 4: Simplify right side
   10,209.61x = 50,187,904.68
5. Step 5: Solve for x
   x = 50,187,904.68/10,209.61
6. Step 6: Final answer
   x = 4,915.75