Finding the Fourth Proportional to 213,312.69, 320,144.00 and 108,161.73

Step by Step Solution

1. Step 1: Write the proportion equation
   213,312.69 : 320,144.00 = 108,161.73 : x
2. Step 2: Convert to fraction form
   213,312.69/320,144.00 = 108,161.73/x
3. Step 3: Cross multiply
   213,312.69x = 320,144.00 × 108,161.73
4. Step 4: Simplify right side
   213,312.69x = 34,627,328,348.31
5. Step 5: Solve for x
   x = 34,627,328,348.31/213,312.69
6. Step 6: Final answer
   x = 162,331.31