Finding the Fourth Proportional to 78,616.12, 108,490.38 and 42,806.28

Step by Step Solution

1. Step 1: Write the proportion equation
   78,616.12 : 108,490.38 = 42,806.28 : x
2. Step 2: Convert to fraction form
   78,616.12/108,490.38 = 42,806.28/x
3. Step 3: Cross multiply
   78,616.12x = 108,490.38 × 42,806.28
4. Step 4: Simplify right side
   78,616.12x = 4,644,069,369.56
5. Step 5: Solve for x
   x = 4,644,069,369.56/78,616.12
6. Step 6: Final answer
   x = 59,072.74