Finding the Fourth Proportional to 209,173.83, 288,662.12 and 113,680.53

Step by Step Solution

1. Step 1: Write the proportion equation
   209,173.83 : 288,662.12 = 113,680.53 : x
2. Step 2: Convert to fraction form
   209,173.83/288,662.12 = 113,680.53/x
3. Step 3: Cross multiply
   209,173.83x = 288,662.12 × 113,680.53
4. Step 4: Simplify right side
   209,173.83x = 32,815,262,792.52
5. Step 5: Solve for x
   x = 32,815,262,792.52/209,173.83
6. Step 6: Final answer
   x = 156,880.35