Finding the Fourth Proportional to 59,258.58, 81,728.07 and 42,257.37

Step by Step Solution

1. Step 1: Write the proportion equation
   59,258.58 : 81,728.07 = 42,257.37 : x
2. Step 2: Convert to fraction form
   59,258.58/81,728.07 = 42,257.37/x
3. Step 3: Cross multiply
   59,258.58x = 81,728.07 × 42,257.37
4. Step 4: Simplify right side
   59,258.58x = 3,453,613,293.38
5. Step 5: Solve for x
   x = 3,453,613,293.38/59,258.58
6. Step 6: Final answer
   x = 58,280.39