Finding the Fourth Proportional to 209,040.72, 288,481.56 and 113,552.88

Step by Step Solution

1. Step 1: Write the proportion equation
   209,040.72 : 288,481.56 = 113,552.88 : x
2. Step 2: Convert to fraction form
   209,040.72/288,481.56 = 113,552.88/x
3. Step 3: Cross multiply
   209,040.72x = 288,481.56 × 113,552.88
4. Step 4: Simplify right side
   209,040.72x = 32,757,911,964.89
5. Step 5: Solve for x
   x = 32,757,911,964.89/209,040.72
6. Step 6: Final answer
   x = 156,705.89