Finding the Fourth Proportional to 111,648.96, 153,921.60 and 89,064.60

Step by Step Solution

1. Step 1: Write the proportion equation
   111,648.96 : 153,921.60 = 89,064.60 : x
2. Step 2: Convert to fraction form
   111,648.96/153,921.60 = 89,064.60/x
3. Step 3: Cross multiply
   111,648.96x = 153,921.60 × 89,064.60
4. Step 4: Simplify right side
   111,648.96x = 13,708,965,735.36
5. Step 5: Solve for x
   x = 13,708,965,735.36/111,648.96
6. Step 6: Final answer
   x = 122,786.33