Finding the Fourth Proportional to 108,902.56, 150,171.60 and 86,205.28

Step by Step Solution

1. Step 1: Write the proportion equation
   108,902.56 : 150,171.60 = 86,205.28 : x
2. Step 2: Convert to fraction form
   108,902.56/150,171.60 = 86,205.28/x
3. Step 3: Cross multiply
   108,902.56x = 150,171.60 × 86,205.28
4. Step 4: Simplify right side
   108,902.56x = 12,945,584,826.05
5. Step 5: Solve for x
   x = 12,945,584,826.05/108,902.56
6. Step 6: Final answer
   x = 118,873.10