Finding the Fourth Proportional to 51,078.72, 76,599.12 and 17,790.24

Step by Step Solution

1. Step 1: Write the proportion equation
   51,078.72 : 76,599.12 = 17,790.24 : x
2. Step 2: Convert to fraction form
   51,078.72/76,599.12 = 17,790.24/x
3. Step 3: Cross multiply
   51,078.72x = 76,599.12 × 17,790.24
4. Step 4: Simplify right side
   51,078.72x = 1,362,716,728.59
5. Step 5: Solve for x
   x = 1,362,716,728.59/51,078.72
6. Step 6: Final answer
   x = 26,678.76