Finding the Fourth Proportional to 209,189.70, 288,684.72 and 113,696.37

Step by Step Solution

1. Step 1: Write the proportion equation
   209,189.70 : 288,684.72 = 113,696.37 : x
2. Step 2: Convert to fraction form
   209,189.70/288,684.72 = 113,696.37/x
3. Step 3: Cross multiply
   209,189.70x = 288,684.72 × 113,696.37
4. Step 4: Simplify right side
   209,189.70x = 32,822,404,738.47
5. Step 5: Solve for x
   x = 32,822,404,738.47/209,189.70
6. Step 6: Final answer
   x = 156,902.59