Finding the Fourth Proportional to 191,280.28, 263,976.54 and 106,399

Step by Step Solution

1. Step 1: Write the proportion equation
   191,280.28 : 263,976.54 = 106,399 : x
2. Step 2: Convert to fraction form
   191,280.28/263,976.54 = 106,399/x
3. Step 3: Cross multiply
   191,280.28x = 263,976.54 × 106,399
4. Step 4: Simplify right side
   191,280.28x = 28,086,839,879.46
5. Step 5: Solve for x
   x = 28,086,839,879.46/191,280.28
6. Step 6: Final answer
   x = 146,836.05