Finding the Fourth Proportional to 209,173.33, 288,661.43 and 113,680.03

Step by Step Solution

1. Step 1: Write the proportion equation
   209,173.33 : 288,661.43 = 113,680.03 : x
2. Step 2: Convert to fraction form
   209,173.33/288,661.43 = 113,680.03/x
3. Step 3: Cross multiply
   209,173.33x = 288,661.43 × 113,680.03
4. Step 4: Simplify right side
   209,173.33x = 32,815,038,010.54
5. Step 5: Solve for x
   x = 32,815,038,010.54/209,173.33
6. Step 6: Final answer
   x = 156,879.65