Finding the Fourth Proportional to 12,914.16, 17,705.49 and 12,680.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,914.16 : 17,705.49 = 12,680.88 : x
2. Step 2: Convert to fraction form
   12,914.16/17,705.49 = 12,680.88/x
3. Step 3: Cross multiply
   12,914.16x = 17,705.49 × 12,680.88
4. Step 4: Simplify right side
   12,914.16x = 224,521,194.03
5. Step 5: Solve for x
   x = 224,521,194.03/12,914.16
6. Step 6: Final answer
   x = 17,385.66