Finding the Fourth Proportional to 209,042.72, 288,484.32 and 113,554.88

Step by Step Solution

1. Step 1: Write the proportion equation
   209,042.72 : 288,484.32 = 113,554.88 : x
2. Step 2: Convert to fraction form
   209,042.72/288,484.32 = 113,554.88/x
3. Step 3: Cross multiply
   209,042.72x = 288,484.32 × 113,554.88
4. Step 4: Simplify right side
   209,042.72x = 32,758,802,339.48
5. Step 5: Solve for x
   x = 32,758,802,339.48/209,042.72
6. Step 6: Final answer
   x = 156,708.65