Finding the Fourth Proportional to 12,262.72, 18,368.16 and 10,177.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,262.72 : 18,368.16 = 10,177.78 : x
2. Step 2: Convert to fraction form
   12,262.72/18,368.16 = 10,177.78/x
3. Step 3: Cross multiply
   12,262.72x = 18,368.16 × 10,177.78
4. Step 4: Simplify right side
   12,262.72x = 186,947,091.48
5. Step 5: Solve for x
   x = 186,947,091.48/12,262.72
6. Step 6: Final answer
   x = 15,245.16