Finding the Fourth Proportional to 12,123.76, 18,168.54 and 9,647.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,123.76 : 18,168.54 = 9,647.56 : x
2. Step 2: Convert to fraction form
   12,123.76/18,168.54 = 9,647.56/x
3. Step 3: Cross multiply
   12,123.76x = 18,168.54 × 9,647.56
4. Step 4: Simplify right side
   12,123.76x = 175,282,079.76
5. Step 5: Solve for x
   x = 175,282,079.76/12,123.76
6. Step 6: Final answer
   x = 14,457.73