Finding the Fourth Proportional to 108,976.54, 150,454.71 and 86,406.70

Step by Step Solution

1. Step 1: Write the proportion equation
   108,976.54 : 150,454.71 = 86,406.70 : x
2. Step 2: Convert to fraction form
   108,976.54/150,454.71 = 86,406.70/x
3. Step 3: Cross multiply
   108,976.54x = 150,454.71 × 86,406.70
4. Step 4: Simplify right side
   108,976.54x = 13,000,294,990.56
5. Step 5: Solve for x
   x = 13,000,294,990.56/108,976.54
6. Step 6: Final answer
   x = 119,294.44