Finding the Fourth Proportional to 111,945.09, 154,365.83 and 86,455.61

Step by Step Solution

1. Step 1: Write the proportion equation
   111,945.09 : 154,365.83 = 86,455.61 : x
2. Step 2: Convert to fraction form
   111,945.09/154,365.83 = 86,455.61/x
3. Step 3: Cross multiply
   111,945.09x = 154,365.83 × 86,455.61
4. Step 4: Simplify right side
   111,945.09x = 13,345,791,995.81
5. Step 5: Solve for x
   x = 13,345,791,995.81/111,945.09
6. Step 6: Final answer
   x = 119,217.31