Finding the Fourth Proportional to 209,105.96, 288,572.10 and 123,071

Step by Step Solution

1. Step 1: Write the proportion equation
   209,105.96 : 288,572.10 = 123,071 : x
2. Step 2: Convert to fraction form
   209,105.96/288,572.10 = 123,071/x
3. Step 3: Cross multiply
   209,105.96x = 288,572.10 × 123,071
4. Step 4: Simplify right side
   209,105.96x = 35,514,856,919.10
5. Step 5: Solve for x
   x = 35,514,856,919.10/209,105.96
6. Step 6: Final answer
   x = 169,841.44