Finding the Fourth Proportional to 78,717, 108,626.28 and 42,906.24

Step by Step Solution

1. Step 1: Write the proportion equation
   78,717 : 108,626.28 = 42,906.24 : x
2. Step 2: Convert to fraction form
   78,717/108,626.28 = 42,906.24/x
3. Step 3: Cross multiply
   78,717x = 108,626.28 × 42,906.24
4. Step 4: Simplify right side
   78,717x = 4,660,745,239.99
5. Step 5: Solve for x
   x = 4,660,745,239.99/78,717
6. Step 6: Final answer
   x = 59,208.88