Finding the Fourth Proportional to 42,805.65, 58,949.31 and 30,850.05

Step by Step Solution

1. Step 1: Write the proportion equation
   42,805.65 : 58,949.31 = 30,850.05 : x
2. Step 2: Convert to fraction form
   42,805.65/58,949.31 = 30,850.05/x
3. Step 3: Cross multiply
   42,805.65x = 58,949.31 × 30,850.05
4. Step 4: Simplify right side
   42,805.65x = 1,818,589,160.97
5. Step 5: Solve for x
   x = 1,818,589,160.97/42,805.65
6. Step 6: Final answer
   x = 42,484.79