Finding the Fourth Proportional to 11,684.16, 17,517.60 and 4,284.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,684.16 : 17,517.60 = 4,284.72 : x
2. Step 2: Convert to fraction form
   11,684.16/17,517.60 = 4,284.72/x
3. Step 3: Cross multiply
   11,684.16x = 17,517.60 × 4,284.72
4. Step 4: Simplify right side
   11,684.16x = 75,058,011.07
5. Step 5: Solve for x
   x = 75,058,011.07/11,684.16
6. Step 6: Final answer
   x = 6,423.91