Finding the Fourth Proportional to 22,288.72, 30,765 and 12,863.92

Step by Step Solution

1. Step 1: Write the proportion equation
   22,288.72 : 30,765 = 12,863.92 : x
2. Step 2: Convert to fraction form
   22,288.72/30,765 = 12,863.92/x
3. Step 3: Cross multiply
   22,288.72x = 30,765 × 12,863.92
4. Step 4: Simplify right side
   22,288.72x = 395,758,498.80
5. Step 5: Solve for x
   x = 395,758,498.80/22,288.72
6. Step 6: Final answer
   x = 17,756.00