Finding the Fourth Proportional to 300,942.72, 415,330.65 and 171,900.47

Step by Step Solution

1. Step 1: Write the proportion equation
   300,942.72 : 415,330.65 = 171,900.47 : x
2. Step 2: Convert to fraction form
   300,942.72/415,330.65 = 171,900.47/x
3. Step 3: Cross multiply
   300,942.72x = 415,330.65 × 171,900.47
4. Step 4: Simplify right side
   300,942.72x = 71,395,534,978.73
5. Step 5: Solve for x
   x = 71,395,534,978.73/300,942.72
6. Step 6: Final answer
   x = 237,239.61