Finding the Fourth Proportional to 300,196.77, 414,214.41 and 171,129.60

Step by Step Solution

1. Step 1: Write the proportion equation
   300,196.77 : 414,214.41 = 171,129.60 : x
2. Step 2: Convert to fraction form
   300,196.77/414,214.41 = 171,129.60/x
3. Step 3: Cross multiply
   300,196.77x = 414,214.41 × 171,129.60
4. Step 4: Simplify right side
   300,196.77x = 70,884,346,297.54
5. Step 5: Solve for x
   x = 70,884,346,297.54/300,196.77
6. Step 6: Final answer
   x = 236,126.28