Finding the Fourth Proportional to 315,144.63, 434,902.37 and 171,905.31

Step by Step Solution

1. Step 1: Write the proportion equation
   315,144.63 : 434,902.37 = 171,905.31 : x
2. Step 2: Convert to fraction form
   315,144.63/434,902.37 = 171,905.31/x
3. Step 3: Cross multiply
   315,144.63x = 434,902.37 × 171,905.31
4. Step 4: Simplify right side
   315,144.63x = 74,762,025,875.06
5. Step 5: Solve for x
   x = 74,762,025,875.06/315,144.63
6. Step 6: Final answer
   x = 237,230.84