Finding the Fourth Proportional to 42,724.80, 58,890.24 and 30,771.36

Step by Step Solution

1. Step 1: Write the proportion equation
   42,724.80 : 58,890.24 = 30,771.36 : x
2. Step 2: Convert to fraction form
   42,724.80/58,890.24 = 30,771.36/x
3. Step 3: Cross multiply
   42,724.80x = 58,890.24 × 30,771.36
4. Step 4: Simplify right side
   42,724.80x = 1,812,132,775.53
5. Step 5: Solve for x
   x = 1,812,132,775.53/42,724.80
6. Step 6: Final answer
   x = 42,414.07