Finding the Fourth Proportional to 12,499.74, 17,225.89 and 8,956.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,499.74 : 17,225.89 = 8,956.80 : x
2. Step 2: Convert to fraction form
   12,499.74/17,225.89 = 8,956.80/x
3. Step 3: Cross multiply
   12,499.74x = 17,225.89 × 8,956.80
4. Step 4: Simplify right side
   12,499.74x = 154,288,829.16
5. Step 5: Solve for x
   x = 154,288,829.16/12,499.74
6. Step 6: Final answer
   x = 12,343.36