Finding the Fourth Proportional to 22,106.25, 30,506.63 and 12,680.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,106.25 : 30,506.63 = 12,680.28 : x
2. Step 2: Convert to fraction form
   22,106.25/30,506.63 = 12,680.28/x
3. Step 3: Cross multiply
   22,106.25x = 30,506.63 × 12,680.28
4. Step 4: Simplify right side
   22,106.25x = 386,832,546.86
5. Step 5: Solve for x
   x = 386,832,546.86/22,106.25
6. Step 6: Final answer
   x = 17,498.79