Finding the Fourth Proportional to 12,404.80, 18,517.95 and 10,630.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,404.80 : 18,517.95 = 10,630.72 : x
2. Step 2: Convert to fraction form
   12,404.80/18,517.95 = 10,630.72/x
3. Step 3: Cross multiply
   12,404.80x = 18,517.95 × 10,630.72
4. Step 4: Simplify right side
   12,404.80x = 196,859,141.42
5. Step 5: Solve for x
   x = 196,859,141.42/12,404.80
6. Step 6: Final answer
   x = 15,869.59