Finding the Fourth Proportional to 12,318.82, 18,473.91 and 7,631.67

Step by Step Solution

1. Step 1: Write the proportion equation
   12,318.82 : 18,473.91 = 7,631.67 : x
2. Step 2: Convert to fraction form
   12,318.82/18,473.91 = 7,631.67/x
3. Step 3: Cross multiply
   12,318.82x = 18,473.91 × 7,631.67
4. Step 4: Simplify right side
   12,318.82x = 140,986,784.73
5. Step 5: Solve for x
   x = 140,986,784.73/12,318.82
6. Step 6: Final answer
   x = 11,444.83