Finding the Fourth Proportional to 42,231.78, 58,302.99 and 28,823.04

Step by Step Solution

1. Step 1: Write the proportion equation
   42,231.78 : 58,302.99 = 28,823.04 : x
2. Step 2: Convert to fraction form
   42,231.78/58,302.99 = 28,823.04/x
3. Step 3: Cross multiply
   42,231.78x = 58,302.99 × 28,823.04
4. Step 4: Simplify right side
   42,231.78x = 1,680,469,412.89
5. Step 5: Solve for x
   x = 1,680,469,412.89/42,231.78
6. Step 6: Final answer
   x = 39,791.58