Finding the Fourth Proportional to 307,667.69, 424,602.71 and 171,728.09

Step by Step Solution

1. Step 1: Write the proportion equation
   307,667.69 : 424,602.71 = 171,728.09 : x
2. Step 2: Convert to fraction form
   307,667.69/424,602.71 = 171,728.09/x
3. Step 3: Cross multiply
   307,667.69x = 424,602.71 × 171,728.09
4. Step 4: Simplify right side
   307,667.69x = 72,916,212,397.12
5. Step 5: Solve for x
   x = 72,916,212,397.12/307,667.69
6. Step 6: Final answer
   x = 236,996.65