Finding the Fourth Proportional to 12,680.19, 17,474.00 and 9,136.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,680.19 : 17,474.00 = 9,136.71 : x
2. Step 2: Convert to fraction form
   12,680.19/17,474.00 = 9,136.71/x
3. Step 3: Cross multiply
   12,680.19x = 17,474.00 × 9,136.71
4. Step 4: Simplify right side
   12,680.19x = 159,654,824.86
5. Step 5: Solve for x
   x = 159,654,824.86/12,680.19
6. Step 6: Final answer
   x = 12,590.89