Finding the Fourth Proportional to 307,604.89, 424,495.79 and 171,636.37

Step by Step Solution

1. Step 1: Write the proportion equation
   307,604.89 : 424,495.79 = 171,636.37 : x
2. Step 2: Convert to fraction form
   307,604.89/424,495.79 = 171,636.37/x
3. Step 3: Cross multiply
   307,604.89x = 424,495.79 × 171,636.37
4. Step 4: Simplify right side
   307,604.89x = 72,858,915,200.10
5. Step 5: Solve for x
   x = 72,858,915,200.10/307,604.89
6. Step 6: Final answer
   x = 236,858.77