Finding the Fourth Proportional to 9,687.34, 14,517.12 and 5,518.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,687.34 : 14,517.12 = 5,518.72 : x
2. Step 2: Convert to fraction form
   9,687.34/14,517.12 = 5,518.72/x
3. Step 3: Cross multiply
   9,687.34x = 14,517.12 × 5,518.72
4. Step 4: Simplify right side
   9,687.34x = 80,115,920.49
5. Step 5: Solve for x
   x = 80,115,920.49/9,687.34
6. Step 6: Final answer
   x = 8,270.17