Finding the Fourth Proportional to 300,993.31, 415,354.89 and 171,906.40

Step by Step Solution

1. Step 1: Write the proportion equation
   300,993.31 : 415,354.89 = 171,906.40 : x
2. Step 2: Convert to fraction form
   300,993.31/415,354.89 = 171,906.40/x
3. Step 3: Cross multiply
   300,993.31x = 415,354.89 × 171,906.40
4. Step 4: Simplify right side
   300,993.31x = 71,402,164,059.17
5. Step 5: Solve for x
   x = 71,402,164,059.17/300,993.31
6. Step 6: Final answer
   x = 237,221.77