Finding the Fourth Proportional to 30,635.30, 42,245.60 and 28,849.43

Step by Step Solution

1. Step 1: Write the proportion equation
   30,635.30 : 42,245.60 = 28,849.43 : x
2. Step 2: Convert to fraction form
   30,635.30/42,245.60 = 28,849.43/x
3. Step 3: Cross multiply
   30,635.30x = 42,245.60 × 28,849.43
4. Step 4: Simplify right side
   30,635.30x = 1,218,761,124.53
5. Step 5: Solve for x
   x = 1,218,761,124.53/30,635.30
6. Step 6: Final answer
   x = 39,782.91