Finding the Fourth Proportional to 209,173.47, 288,661.61 and 113,680.15

Step by Step Solution

1. Step 1: Write the proportion equation
   209,173.47 : 288,661.61 = 113,680.15 : x
2. Step 2: Convert to fraction form
   209,173.47/288,661.61 = 113,680.15/x
3. Step 3: Cross multiply
   209,173.47x = 288,661.61 × 113,680.15
4. Step 4: Simplify right side
   209,173.47x = 32,815,095,124.04
5. Step 5: Solve for x
   x = 32,815,095,124.04/209,173.47
6. Step 6: Final answer
   x = 156,879.81