Finding the Fourth Proportional to 71,028.28, 98,036.22 and 42,728.50

Step by Step Solution

1. Step 1: Write the proportion equation
   71,028.28 : 98,036.22 = 42,728.50 : x
2. Step 2: Convert to fraction form
   71,028.28/98,036.22 = 42,728.50/x
3. Step 3: Cross multiply
   71,028.28x = 98,036.22 × 42,728.50
4. Step 4: Simplify right side
   71,028.28x = 4,188,940,626.27
5. Step 5: Solve for x
   x = 4,188,940,626.27/71,028.28
6. Step 6: Final answer
   x = 58,975.67