Finding the Fourth Proportional to 12,101.76, 18,168.12 and 7,738.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,101.76 : 18,168.12 = 7,738.56 : x
2. Step 2: Convert to fraction form
   12,101.76/18,168.12 = 7,738.56/x
3. Step 3: Cross multiply
   12,101.76x = 18,168.12 × 7,738.56
4. Step 4: Simplify right side
   12,101.76x = 140,595,086.71
5. Step 5: Solve for x
   x = 140,595,086.71/12,101.76
6. Step 6: Final answer
   x = 11,617.74