Finding the Fourth Proportional to 78,678.28, 108,577.26 and 42,868.27

Step by Step Solution

1. Step 1: Write the proportion equation
   78,678.28 : 108,577.26 = 42,868.27 : x
2. Step 2: Convert to fraction form
   78,678.28/108,577.26 = 42,868.27/x
3. Step 3: Cross multiply
   78,678.28x = 108,577.26 × 42,868.27
4. Step 4: Simplify right side
   78,678.28x = 4,654,519,297.54
5. Step 5: Solve for x
   x = 4,654,519,297.54/78,678.28
6. Step 6: Final answer
   x = 59,158.88