Finding the Fourth Proportional to 108,456.54, 149,678.55 and 79,906.74

Step by Step Solution

1. Step 1: Write the proportion equation
   108,456.54 : 149,678.55 = 79,906.74 : x
2. Step 2: Convert to fraction form
   108,456.54/149,678.55 = 79,906.74/x
3. Step 3: Cross multiply
   108,456.54x = 149,678.55 × 79,906.74
4. Step 4: Simplify right side
   108,456.54x = 11,960,324,978.43
5. Step 5: Solve for x
   x = 11,960,324,978.43/108,456.54
6. Step 6: Final answer
   x = 110,277.58