Finding the Fourth Proportional to 42,136.83, 58,172.18 and 28,727.79

Step by Step Solution

1. Step 1: Write the proportion equation
   42,136.83 : 58,172.18 = 28,727.79 : x
2. Step 2: Convert to fraction form
   42,136.83/58,172.18 = 28,727.79/x
3. Step 3: Cross multiply
   42,136.83x = 58,172.18 × 28,727.79
4. Step 4: Simplify right side
   42,136.83x = 1,671,158,170.88
5. Step 5: Solve for x
   x = 1,671,158,170.88/42,136.83
6. Step 6: Final answer
   x = 39,660.27