Finding the Fourth Proportional to 30,777.42, 42,448.68 and 22,280.79

Step by Step Solution

1. Step 1: Write the proportion equation
   30,777.42 : 42,448.68 = 22,280.79 : x
2. Step 2: Convert to fraction form
   30,777.42/42,448.68 = 22,280.79/x
3. Step 3: Cross multiply
   30,777.42x = 42,448.68 × 22,280.79
4. Step 4: Simplify right side
   30,777.42x = 945,790,124.86
5. Step 5: Solve for x
   x = 945,790,124.86/30,777.42
6. Step 6: Final answer
   x = 30,730.00