Finding the Fourth Proportional to 30,633.55, 42,243.18 and 28,847.68

Step by Step Solution

1. Step 1: Write the proportion equation
   30,633.55 : 42,243.18 = 28,847.68 : x
2. Step 2: Convert to fraction form
   30,633.55/42,243.18 = 28,847.68/x
3. Step 3: Cross multiply
   30,633.55x = 42,243.18 × 28,847.68
4. Step 4: Simplify right side
   30,633.55x = 1,218,617,738.82
5. Step 5: Solve for x
   x = 1,218,617,738.82/30,633.55
6. Step 6: Final answer
   x = 39,780.49