Finding the Fourth Proportional to 8,560, 12,844.80 and 8,494.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,560 : 12,844.80 = 8,494.72 : x
2. Step 2: Convert to fraction form
   8,560/12,844.80 = 8,494.72/x
3. Step 3: Cross multiply
   8,560x = 12,844.80 × 8,494.72
4. Step 4: Simplify right side
   8,560x = 109,112,979.46
5. Step 5: Solve for x
   x = 109,112,979.46/8,560
6. Step 6: Final answer
   x = 12,746.84