Finding the Fourth Proportional to 42,537.42, 58,721.76 and 28,399.68

Step by Step Solution

1. Step 1: Write the proportion equation
   42,537.42 : 58,721.76 = 28,399.68 : x
2. Step 2: Convert to fraction form
   42,537.42/58,721.76 = 28,399.68/x
3. Step 3: Cross multiply
   42,537.42x = 58,721.76 × 28,399.68
4. Step 4: Simplify right side
   42,537.42x = 1,667,679,193.04
5. Step 5: Solve for x
   x = 1,667,679,193.04/42,537.42
6. Step 6: Final answer
   x = 39,204.99