Finding the Fourth Proportional to 51,018.72, 76,509.84 and 17,730.72

Step by Step Solution

1. Step 1: Write the proportion equation
   51,018.72 : 76,509.84 = 17,730.72 : x
2. Step 2: Convert to fraction form
   51,018.72/76,509.84 = 17,730.72/x
3. Step 3: Cross multiply
   51,018.72x = 76,509.84 × 17,730.72
4. Step 4: Simplify right side
   51,018.72x = 1,356,574,550.28
5. Step 5: Solve for x
   x = 1,356,574,550.28/51,018.72
6. Step 6: Final answer
   x = 26,589.74