Finding the Fourth Proportional to 133,417.69, 199,863.54 and 108,485.89

Step by Step Solution

1. Step 1: Write the proportion equation
   133,417.69 : 199,863.54 = 108,485.89 : x
2. Step 2: Convert to fraction form
   133,417.69/199,863.54 = 108,485.89/x
3. Step 3: Cross multiply
   133,417.69x = 199,863.54 × 108,485.89
4. Step 4: Simplify right side
   133,417.69x = 21,682,374,015.45
5. Step 5: Solve for x
   x = 21,682,374,015.45/133,417.69
6. Step 6: Final answer
   x = 162,514.99