Finding the Fourth Proportional to 42,383.58, 58,500.09 and 28,960.26

Step by Step Solution

1. Step 1: Write the proportion equation
   42,383.58 : 58,500.09 = 28,960.26 : x
2. Step 2: Convert to fraction form
   42,383.58/58,500.09 = 28,960.26/x
3. Step 3: Cross multiply
   42,383.58x = 58,500.09 × 28,960.26
4. Step 4: Simplify right side
   42,383.58x = 1,694,177,816.42
5. Step 5: Solve for x
   x = 1,694,177,816.42/42,383.58
6. Step 6: Final answer
   x = 39,972.50