Finding the Fourth Proportional to 307,612.27, 424,503.55 and 171,638.28

Step by Step Solution

1. Step 1: Write the proportion equation
   307,612.27 : 424,503.55 = 171,638.28 : x
2. Step 2: Convert to fraction form
   307,612.27/424,503.55 = 171,638.28/x
3. Step 3: Cross multiply
   307,612.27x = 424,503.55 × 171,638.28
4. Step 4: Simplify right side
   307,612.27x = 72,861,059,175.89
5. Step 5: Solve for x
   x = 72,861,059,175.89/307,612.27
6. Step 6: Final answer
   x = 236,860.05